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Replied by baldy110 on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

29 Oct 2015 08:40
baldy110's Avatar baldy110
What tk11b40 said, I use accidents as an excuse to make the bike better. For example, in 2010 I did a "spare no expense" re-build of my KZ650, it came out beautiful. However there were items that bugged me that I did not consider until after it was finished. I rode it for less than 500 miles and got into an accident on the I-14 to I-5 interchange in California, (Stupid cell phone users). That accident totaled the bike, I dragged the bike home and re-built it again but this time I fixed everything that bugged me and now it's exactly what I have always wanted. Just don't get bumbed out by it and move on.
2010 re-build, pre-crash
[IMG


500 miles later, crash
[IMG


2012 re-build
[IMG

Replied by tk11b40 on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

29 Oct 2015 08:23
tk11b40's Avatar tk11b40
The triple tree is most likely Die Cast, therefore very difficult to weld. I have a good friend who has tig welded die cast for me in the past and been successful. Welding is a strong possibility. The otehr problem is getting the steering stem pressed out of the clamp, which should be done at a good shop. The triple clamp will need to be warmed, then press out the stem. The stem was built by Kossman.... $$$$$$$$$$ ! do not damage that while trying to weld or press it out of the clamp. I think it was somewhere between 250 and 400 clams. Its custom made by Kossman.

Can you send or past a photo of the damage?
When you come over the hill to pick up the tank you should stop by, we can figure out how to fix the steering stop, and possibly make it better in the process.

I can also measure thee triple clamp on the CMM and reverse engineer it. Then we can talk with my programmer to see what he would want to machine one out of billet.

Do not get discouraged, these things happen and are often a chance to make the bike better.

Replied by MAR on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

29 Oct 2015 06:50 - 29 Oct 2015 11:27
MAR's Avatar MAR
Yes I have spoken with Gary. He is happy to repaint the tank. I will take it off this week end and drain the fuel and mail it to him. i will go up there to pick it up when it is done.
I was thinking a fix for the stops might be to tap little bolts into the lower triple tree and just screw little bolts into to them. Thoughts?
Or welding material to the triple tree and getting it powder coated again.
I had to send the counter sprocket back to Ut so they can get the spacing correct for the 530 chain.
Also as long as the rear wheel is off I am getting a new tire.
Finally getting the bar ends opened up a bit to fit bar end mirrors.

Next up a Corbin seat and a steering damper.

Replied by tk11b40 on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

28 Oct 2015 18:04
tk11b40's Avatar tk11b40
Oh boy.

Well. Shit.
That is going to be tough to fix. The steering stop broke away for the lower triple clamp I am assuming. The clamp is from a GSXR 1100. Perhaps this would be a good time to machine billet triple clamps. I can talk with the programmer at work who may do them after hours.

He is gonna be 30 buck an hour. You already have the painter contact info. This is a shame, the tank is brand new.

Replied by 650ed on topic New member in Oxford MS

28 Oct 2015 13:23
650ed's Avatar 650ed
The airbox is pretty dirty, possibly the previous owner never cleaned in over several decades. The oily stuff could be blowby or could just be oily residue from years of use and/or overfilling the oil level. The engine breather exits into the airbox. I would clean it up and not worry about it unless it gets dirty quickly.

As far as the engine running with that airbox - if you do not have a clean, stock air filter to put in it the engine will run very poorly (if it runs at all) because the fuel/air mix will be too lean. Do you still have the rest of the airbox pieces? There should be a cup-like holder that fits inside the box to hold the bottom of the filter in place and a cap with a funnel molded into it that screws into the top of the box. Without those the filter won't stay in place and will not filter since air will simply be drawn around it.

On another note - here are some tips that you may find helpful. If nothing else be SURE to read the section on JIS screws under the TOOLS heading.

Many newbies and not so newbies run into the same problems or issues with their bikes which could be easily avoided with a little preparation. Here are a couple recommendations that I hope you will find useful.

Before riding your KZ you should take a little time to become familiar with it. Simple things like checking the oil, tire pressures, etc. are explained in the Kawasaki Owner's Manual. If you bike didn't come with one (they normally are in a little holder on the bottom of the seat) you can usually find one on eBay - be sure to get one for your exact year/model.


MANUAL

You really should consider buying the Kawasaki Factory Service Manual for your bike. The factory service manual provides instructions on the various maintenance procedures and schedules for your bike, procedures for diagnosing problems, proper torque values for the various fasteners (VERY IMPORTANT), and insight into how each system on your bike works even if you are not repairing that system. Studying the manual before you attempt performing service on your bike will impart an understanding of the system you are working on which will increase the odds of success.

The manuals usually are readily available for most models on eBay and other sources; but be sure to get one that has your specific year and model in it as there are differences between the various KZ650 models. I do not recommend Clymers, Haynes, or other aftermarket manuals as I have seen instances where they provide inaccurate advice. You may decide to use those to supplement the factory manual, but in my opinion they are not a suitable substitute. If you have trouble finding one for your model ask us to help.

When you get the manual take a look at the torque specs. MANY of them are in INCH pounds, and some of the larger bolts are in FOOT pounds. You will need 2 torque wrenches; one small one calibrated in inch pounds and a larger one calibrated in foot pounds. Trying to use a foot pound calibrated wrench to tighten the inch pound fasteners won't work properly even if you do the conversion correctly because the foot pound wrench will not be sensitive / accurate enough at its lowest settings. No torque wrench is accurate at ranges below 20% of its max setting.

TOOLS

WARNING! Do not even try to use Phillips screwdrivers on the Kawasaki cross head screws. Despite their appearance they are not Phillips screws. They are Japanese Industrial Standard (JIS) screws. The tips of Phillips screwdrivers are too long & pointed to allow the 4 blades of the screwdriver to properly engage the screws, so when you apply force the screw head slots will deform and look like crap. The fact is that Phillips screws were deliberately designed to have the screwdriver bit "cam out." This was done to prevent production line assembly from over-tightening, stripping, or breaking the screws. JIS screws do not have this problem. A proper fitting JIS bit can tighten a JIS screw to and beyond the torque spec without camming out. Here's the good news - you can easily modify standard Phillips screwdriver tips to fit the JIS screws.

I have ground down the tips of DeWalt #2 and DeWalt #3 Phillips to make them fit JIS screws. The large crosshead screws on the cases take modified #3 bits (or genuine #3 JIS bits). To modify the DeWalt bits you need to grind the very tip a little, then test fit, then grind a little more and test fit, etc. until the bit no longer "rocks" back and forth in the screwhead. Picture 1 below shows how a DeWalt #3 bit fits the case screws of my KZ650 after being ground properly. The #2 DeWalt bits can be modified the same way to fit smaller JIS screws. Pictures 2 and 3 below shows DeWalt #2 and #3 modified bits.

I did find a place that sells authentic JIS bits. They don't list the #3 bit, but if you contact them they can provide the #3 JIS bits even though they are not listed on the website. These folks were very easy to work with, and the authentic bits do work great. Here's their site:

www.rjrcooltools.com/shop_item_detail.cfm?subcat_ID=89

Pictures 4 & 5 below show a comparison between my home made modified bits with the authentic JIS bits.

PICTURE 1
479


PICTURE 2
480


PICTURE 3
479


PICTURE 4
480


PICTURE 5
480



Before reaching for that wrench or ratchet consider the following. The bolts are steel, but your engine and front forks are aluminum. The bolts are much tougher than the aluminum and if over tightened will strip the aluminum threads. Although these can be repaired, preventing damage by applying proper torque will save you grief, time, and money. Tightening fasteners properly requires torque wrenches. Various vendors, including Snap-on, CDI, Sears, etc., market torque wrenches. The two most popular types are the bar type and micrometer type. Either will work, but the micrometer type is a bit easier to use, especially if you are tightening several fasteners with the same torque - such as cylinder head covers. You will need a torque wrench calibrated in INCH POUNDS for many of the bolts. You will also need a torque wrench calibrated in FOOT POUNDS for the larger bolts. Don't try to use the foot pounds wrench on the smaller bolts as it will not be sensitive enough at low torque settings to provide accurate torque. There are many fasteners that require low torque. These include such things as 6mm oil pan bolts, cylinder head cover bolts, etc. for which the torque in 61-78 inch pounds. These low torque bolts require a wrench that is accurate at low settings and this wrench should be graduated in inch pounds. In addition, there are numerous high torque fasteners such as the front axle nuts (51 - 65 foot pounds) or swing arm pivot shaft nuts (58 - 87 foot pounds). These require a wrench that is accurate at higher settings; this wrench should be graduated in foot pounds. Using the proper torque wrenches to correctly tighten fasteners will help prevent damage and contribute to a safe bike. The Kawasaki Service Manual will list the various torque specs for the bolts. I suggest you get the manual before buying the torque wrenches so you can decide which wrenches best meet the torque specs.

Consider buying a can of Kroil penetrating oil and use it to soak stubborn fasteners for a couple days before trying to loosen them. Remember, the original screws and bolts were installed on your bike when Jimmy Carter was President, so many of them may be hard to remove. Kroil can be bought online, at guns shows, and at some other venues.


MOTOR OIL

The ingredients in oils have changed over the years. For example, today's Castrol GTX oil (and pretty much all other AUTOMOBILE oil) is not the same as it was in the 1980's. Back then it worked great in KZ bikes. But, things have changed. Early AUTOMOBILE oils contained zinc phosphorus compounds (ZDDP) to protect engine components from metal to metal contact. This was good for engines, but it was found to be destructive to catalytic converters. Consequently, in AUTOMOBILE oils ZDDP was virtually eliminated and replaced with different chemistry generically referred to as "Friction Modifiers." These work fine and offer good protection for normal AUTOMOBILE engines. However, today's AUTOMOBILE oil "Friction Modifiers" are destructive to wet clutches. KZ bikes (and many other brands) have wet clutches. As a result of these oil chemistry changes a distinction needed to be made between those oils which are suitable for wet clutches and those which are not. That distinction was documented by the Japanese Engine Oil Standards Implementation Panel (JASO). JASO developed a number of different oil specifications for different applications. The specifications that apply to 4 stroke motorcycles fall under the "4T Specifications." Within the 4T specifications the JASO MA class oils are specifically formulated for 4 stroke motorcycles with wet clutches.

There are synthetic, semi-synthetic, and non-synthetic oils that meet the JASO-MA standard and any of them will work ok. However, using oils that are not designated as meeting the JASO-MA standard is destructive to KZ clutches.

Good luck with your bike. Ed

Replied by 650ed on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

27 Oct 2015 05:10
650ed's Avatar 650ed
That's the main reason I let no one ride my bike. Accidents can happen, but if someone damages your bike you feel bad about it and they feel bad about it. I let a friend ride my BSA once. He went about 30 yards before he crashed through a stand of small trees. :S Oddly enough, the bike wasn't hardly damaged, but he looked like he had been through a chipping machine. Lesson learned. Ed

Replied by 531blackbanshee on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

27 Oct 2015 03:55 - 27 Oct 2015 04:03
531blackbanshee's Avatar 531blackbanshee
sorry to hear about the friendcident those can be painful :whistle: .

www.outlawracingproducts.com/clampsmounts.html

leon

Replied by MAR on topic 1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

26 Oct 2015 16:33
MAR's Avatar MAR
So the time had come to make changes. I have about 1300 miles on it now . I have a 530 chain and have geared it up back to normal. Still trying to get a counter sprocket with the correct spacing to clear the wider tire . Sprocket specialist helping .
Also tried to install Woodcrafts clip ons . However the risers hit the pinch bolts on the triple tree. . Need to find 7/8 inch bar clamps to fit normal bars. Clip ons may not work.
Finally the bad news is my buddy was riding the bike . He was losing balance and turned the handle bars jamming them into the steering lock. Broke the stop and dented the tank. I need to find a way to make strong steering locks and repair the tank.

Replied by 650ed on topic New member, 1st Kawasaki

26 Oct 2015 13:31 - 26 Oct 2015 13:34
650ed's Avatar 650ed
Welcome aboard!

Here are some tips that you may find helpful:

Many newbies and not so newbies run into or issues with their bikes which could be easily avoided with a little preparation or information. Here are a couple recommendations that I hope you will find useful.

Before riding your KZ you should take a little time to become familiar with it. Simple things like checking the oil, tire pressures, etc. are explained in the Kawasaki Owner's Manual. If you bike didn't come with one (they normally are in a little holder on the bottom of the seat) you can usually find one on eBay - be sure to get one for your exact year/model.


MANUAL

You really should consider buying the Kawasaki Factory Service Manual for your bike. The factory service manual provides instructions on the various maintenance procedures and schedules for your bike, procedures for diagnosing problems, proper torque values for the various fasteners (VERY IMPORTANT), and insight into how each system on your bike works even if you are not repairing that system. Studying the manual before you attempt performing service on your bike will impart an understanding of the system you are working on which will increase the odds of success.

The manuals usually are readily available for most models on eBay and other sources; but be sure to get one that has your specific year and model in it as there are differences between the various KZ650 models. I do not recommend Clymers, Haynes, or other aftermarket manuals as I have seen instances where they provide inaccurate advice. You may decide to use those to supplement the factory manual, but in my opinion they are not a suitable substitute. If you have trouble finding one for your model ask us to help.


TOOLS

WARNING! Do not even try to use Phillips screwdrivers on the Kawasaki cross head screws. Despite their appearance they are not Phillips screws. They are Japanese Industrial Standard (JIS) screws. The tips of Phillips screwdrivers are too long & pointed to allow the 4 blades of the screwdriver to properly engage the screws, so when you apply force the screw head slots will deform and look like crap. The fact is that Phillips screws were deliberately designed to have the screwdriver bit "cam out." This was done to prevent production line assembly from over-tightening, stripping, or breaking the screws. JIS screws do not have this problem. A proper fitting JIS bit can tighten a JIS screw to and beyond the torque spec without camming out. Here's the good news - you can easily modify standard Phillips screwdriver tips to fit the JIS screws.

I have ground down the tips of DeWalt #2 and DeWalt #3 Phillips to make them fit JIS screws. The large crosshead screws on the cases take modified #3 bits (or genuine #3 JIS bits). To modify the DeWalt bits you need to grind the very tip a little, then test fit, then grind a little more and test fit, etc. until the bit no longer "rocks" back and forth in the screwhead. Picture 1 below shows how a DeWalt #3 bit fits the case screws of my KZ650 after being ground properly. The #2 DeWalt bits can be modified the same way to fit smaller JIS screws. Pictures 2 and 3 below shows DeWalt #2 and #3 modified bits.

I did find a place that sells authentic JIS bits. They don't list the #3 bit, but if you contact them they can provide the #3 JIS bits even though they are not listed on the website. These folks were very easy to work with, and the authentic bits do work great. Here's their site:

www.rjrcooltools.com/shop_item_detail.cfm?subcat_ID=89

Pictures 4 & 5 below show a comparison between my home made modified bits with the authentic JIS bits.

PICTURE 1
[IMG


PICTURE 2
[IMG


PICTURE 3
[IMG


PICTURE 4
[IMG


PICTURE 5
[IMG




Before reaching for that wrench or ratchet consider the following. The bolts are steel, but your engine and front forks are aluminum. The bolts are much tougher than the aluminum and if over tightened will strip the aluminum threads or sometimes break off leaving nothing much left to grab. Although these can be repaired, preventing damage by applying proper torque will save you grief, time, and money. Tightening fasteners properly requires torque wrenches. Various vendors, including Snap-on, CDI, Sears, etc., market torque wrenches. The two most popular types are the bar type and micrometer type. Either will work, but the micrometer type is a bit easier to use, especially if you are tightening several fasteners with the same torque - such as cylinder head covers. You will need a torque wrench calibrated in INCH POUNDS for many of the bolts. You will also need a torque wrench calibrated in FOOT POUNDS for the larger bolts. Don't try to use the foot pounds wrench on the smaller bolts as it will not be sensitive enough at low torque settings to provide accurate torque. There are many fasteners that require low torque. These include such things as 6mm oil pan bolts, cylinder head cover bolts, etc. for which the torque in 61-78 inch pounds. These low torque bolts require a wrench that is accurate at low settings and this wrench should be graduated in inch pounds. In addition, there are numerous high torque fasteners such as the front axle nuts (51 - 65 foot pounds) or swing arm pivot shaft nuts (58 - 87 foot pounds). These require a wrench that is accurate at higher settings; this wrench should be graduated in foot pounds. Using the proper torque wrenches to correctly tighten fasteners will help prevent damage and contribute to a safe bike. The Kawasaki Service Manual will list the various torque specs for the bolts. I suggest you get the manual before buying the torque wrenches so you can decide which wrenches best meet the torque specs.

Consider buying a can of Kroil penetrating oil and use it to soak stubborn fasteners for a couple days before trying to loosen them. Remember, the original screws and bolts were installed on your bike when Jimmy Carter was President, so many of them may be hard to remove. Kroil can be bought online, at guns shows, and at some other venues.


MOTOR OIL
The ingredients in oils have changed over the years. For example, today's Castrol GTX oil (and pretty much all other AUTOMOBILE oil) is not the same as it was in the 1980's. Back then it worked great in KZ bikes, but things have changed. Early AUTOMOBILE oils contained zinc phosphorus compounds (ZDDP) to protect engine components from metal to metal contact. This was good for engines, but it was found to be destructive to catalytic converters. Consequently, in AUTOMOBILE oils ZDDP was virtually eliminated and replaced with different chemistry generically referred to as "Friction Modifiers." These work fine and offer good protection for normal AUTOMOBILE engines. However, today's AUTOMOBILE oil "Friction Modifiers" are destructive to wet clutches. KZ bikes (and many other brands) have wet clutches. As a result of these oil chemistry changes a distinction needed to be made between those oils which are suitable for wet clutches and those which are not. That distinction was documented by the Japanese Engine Oil Standards Implementation Panel (JASO). JASO developed a number of different oil specifications for different applications. The specifications that apply to 4 stroke motorcycles fall under the "4T Specifications." Within the 4T specifications the JASO MA class oils are specifically formulated for 4 stroke motorcycles with wet clutches.

There are synthetic, semi-synthetic, and non-synthetic oils that meet the JASO-MA standard and any of them will work ok. However, using oils that are not designated as meeting the JASO-MA standard is destructive to KZ clutches.

Good luck with your bike. Ed

Replied by twerth on topic 1981 KZ650 Basket Case

22 Oct 2015 03:35
twerth's Avatar twerth
We've made a little progress over the last couple of weeks. Just got the swingarm bearings yesterday, so we'll have a roller by the weekend.


Attachment 2015-10-1816.55.10.jpg not found

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