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TOPIC: '80 KZ 650

'80 KZ 650 2 years 2 months ago #540652

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Just purchased my 2nd bike ever, a KZ 650. The first being my Dad's original '72 360 Enduro. Been having a blast working and playing on this vintage bike, so I just had to have another one.

It has been less than a week. Had trouble keeping it running after starting, racing on choke and wouldn't take any throttle till very warm. AND just had my first ever flat on the front while riding around the neighborhood working out the adjustment issues! :blink:



'72 RT2 360, '80 KZ 650F
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'80 KZ 650 2 years 2 months ago #540658

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Welcome Jay.
Nice looking bikes.

Did your 650 come with the individual pod filters, or did you put them on?
Wonder if the carbs were rejetted for them.
Rob.
Ontario, CANADA
http://www.kz650.info/
'77 KZ650 C1 newest
'78 KZ650 C2 18x18 100,000+ kms
'78 KZ650 C2 project 6 #s off
'79 KZ650 C3
KZR Ontario Chapter
Need a key for your kz/z? I can make them.
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'80 KZ 650 2 years 2 months ago #540659

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Welcome aboard Jay! Very nice looking bike? Is is as great shape as it looks in the picture? If the engine is racing on you I would check for air leaks at the boots between the carbs and the head. Spray some carb cleaner around them while its running and see if there is any change in the rpm. It was good you got the flat at low speeds instead of the highway. Since you got the flat, might as well purchase a new set of tires so you have a matching set. That is best for safety. The tires on there may be older than 5 years old anyhow. You can get a nice set of Kenda's for about $120 shipped. Then just a matter of having them mounted. Have fun. Good luck.
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'80 KZ 650 2 years 2 months ago #540687

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Welcome - good choice of bikes :)
1977 KZ650B1
1980 F1 engine
B1 3-phase alternator
B1 Points ignition
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'80 KZ 650 2 years 2 months ago #540838

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Thanks guys for the compliments. rstnick, a PO put on the pods. He actually did a lot of work, with some very nice upgrades; as far as I can tell. Below is a list of the things he had done.

I played some more with starting it, and it is getting better; taking less time to take throttle. It was way out of adjustment on the idle screw. Still has the flat though. :(
Start point
29,800 miles
top end rebuilt
upgraded to dynatec coils and dynatec electronic ignition
new tires front and back, fresh paint job within the year.
4 into 1 exhaust.
4 K&N air filter pods.

First updates
Updated turn signals
Updated (rounded) break light.
Breaks bled & new Kevlar break line.
Oil change
Plate bracket eliminated.

Drag bars
Café Fairing
New grips
Bar end mirrors
Fork “pre-load” spacer & thick oil.

December 2011 updates

New throttle & clutch cables
Hot Rod pipe wrap
New fork seals.
Progressive fork springs.
Black powder coated fork lowers
Black fork covers “gaters”
Progressive rear shocks.
Modern break master cylinder and grippy break pads
New EBC breaks shoes
New battery
Louder horn
Pirelli Sport Demon tires
General Inspection & maintenance.
Frame paint touchup
'72 RT2 360, '80 KZ 650F
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'80 KZ 650 2 years 2 months ago #540867

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HI KZ Jay, Check with the previous owner to see if he put larger jets in the carbs. I also have a 1980 E. I had to put 17.5 idle and 112.5 mains in it. Runs like a dream. Good luck and welcome. Bob
Bob KZ 650 E1, En 450
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'80 KZ 650 2 years 2 months ago #540914

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Welcome aboard.

It looks like you'll be doing a bit a of learning getting it sorted. Once you do get it sorted, hang on!
Nate

Nates vintage bike axiom: Riding is the reward for time spent wrenching.
Murphys corollary: Wrenching is the result of time spent riding.

1979 KZ650 (Complete!)
1979 KZ650 SR (Sold!)
1979 KL250 (For sale)
1994 Bayou 400 (four wheel peel :D )
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'80 KZ 650 2 years 2 months ago #541070

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Welcome KZ-Jay.
80 KZ750 H1 - the Kaw calf
79 KZ750 Twin - Miss Nov 2008 KZR calander
79 KZ750 Twin parts bike
78 KZ650 C2 Parts Bike
75 KZ400 Wife's old bike sold
81 KZ440 A2 LTD Wife's new bike
Jim
Quincy,IL
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'80 KZ 650 2 years 2 months ago #541084

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First welcome to the fun.

Second, if that is a 1980 E or LTD model, then the tank, side covers, and tail have been added from a B,C or F model. If they have not been changed then I would guess it is a F model. It is a nice looking machine you have either way. Now continue to fix that which needs fixing and enjoy the riding.
1977 KZ650 B1
Pods and Denco header


This is my Z

OLD KAW OWNERS SMILE ALOT
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'80 KZ 650 2 years 2 months ago #541161

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I believe the PO said it was an E or F. Can't remember. What are the differences?
'72 RT2 360, '80 KZ 650F
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'80 KZ 650 2 years 2 months ago #541169

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You could compare the E & F models over at the jarlef z650 site.
It's probably an F1, which has an 18" Rr wheel & a ducktail. Those also have black meter covers & headlight shell and a black plastic chain guard. The Ltd has a 16" Rr & no cowl over the tail light & more chrome.

Since there have been some changes made to the bike, it's kinda hard to say for sure. You could check over at CycleChaos.com to see if the engine & frame numbers shed any light on what it is. I don't think the VIN lookup at Kawasaki.com will recognize yours; it only works w 17-digit vins.
1981 KZ650 Competition, Sports, and Road.
Last Edit: 2 years 2 months ago by martin_csr.
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'80 KZ 650 2 years 2 months ago #541212

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The frame # stamped on the neck will have a letter in it that will indicate what the frame began its life as.

example
KZ650Bxxxxxx = B model
KZ650Cxxxxxx = C model
KZ650Dxxxxxx = D model
KZ650Exxxxxx = E model
KZ650Fxxxxxx = F model
JKAWZEHxxxxxx = H model
1977 KZ650 B1
Pods and Denco header


This is my Z

OLD KAW OWNERS SMILE ALOT
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'80 KZ 650 2 years 1 month ago #548555

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The racing issue was a loose nut on the throttle cable linkage. The flat tire ended being a loose valve stem. Otherwise it has been running great.

I have run some Stabil thru a few tanks and it seems to warm up faster and take throttle sooner. I thought it took an inordinate amount of time to warm up, but after reading through the forums that seems to be normal. I should get a inline fuel filter.

There are some caps in some weird spots on the carb that look like lines of some sort should go to. The frame says it is an KZ650F, but the engine case says KZ650B. The petcock is not vacuum assisted.

I did have it leaking fuel out of one carb overflow line on one night though. I left the petcock on as I usually do. It hasn't done it since. I guess a float got stuck open?

I removed the cafe faring and lowered the gauges.

'72 RT2 360, '80 KZ 650F
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'80 KZ 650 2 years 1 month ago #548610

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Chances are it's just a speck of debris from the fuel that got trapped on a float, preventing it from closing. I had the same thing as you with a one-time overflow and promptly installed an inline filter.
1977 KZ650B1
1980 F1 engine
B1 3-phase alternator
B1 Points ignition
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'80 KZ 650 2 years 1 month ago #548647

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From the frame and engine ID you posted it sounds like you have a F model. To the best of my knowledge there were 2 types of engine IDs
The KZ650BE used on the B, C and F models
The KZ650DE used on the D, E and H models
1977 KZ650 B1
Pods and Denco header


This is my Z

OLD KAW OWNERS SMILE ALOT
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'80 KZ 650 2 years 1 month ago #548662

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kz-jay wrote:
I believe the PO said it was an E or F. Can't remember. What are the differences?

One difference is the rear wheel, E1 (LTD) has a 16", F1 has an 18". Since your bike clearly has an 18" that would make it an F1.

And as far as I know Bruce (gd4now) is correct about the engine numbers, according to Jarle's site the F1 starts at engine no. KZ650BE114501, F2 (no kickstart from this point) starts at KZ650BE124001.

Oh, and welcome aboard.
77 KZ 650 B1, 82 GPz 1100 B2.
Last Edit: 2 years 1 month ago by OnkelB.
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'80 KZ 650 2 years 1 month ago #548844

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How do I know what kind of mikuni carbs I have, is there a part# on them somewhere?

I am thinking they are 29mm or 33mm Smoothbore carbs VM29 or VM33...
'72 RT2 360, '80 KZ 650F
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'80 KZ 650 2 years 1 month ago #548855

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kz-jay wrote:
How do I know what kind of mikuni carbs I have, is there a part# on them somewhere?

I am thinking they are 29mm or 33mm Smoothbore carbs VM29 or VM33...

The following link includes some pics and info about 29 smoothbores.

Click > www.z1enterprises.com/Z1CarbGuide.aspx

Good Fortune! :)
Last Edit: 2 years 1 month ago by Patton.
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'80 KZ 650 2 years 1 month ago #548868

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kz-jay wrote:
I am thinking they are 29mm or 33mm Smoothbore carbs VM29 or VM33...

VM29 and VM33 don't have the horisontal ribs, your carbs look like a set of stock VM24SS to me.
77 KZ 650 B1, 82 GPz 1100 B2.
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'80 KZ 650 2 years 1 month ago #548877

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Agree with what onkelb says. They look like either vm24ss or vm22ss carbs.

There should be an ID stamped on the flange just below the choke handle, if not then look at the same flange on the other side of the carb set. If you post what the ID is we may well be able to tell you have you have.
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1977 KZ650 B1
Pods and Denco header


This is my Z

OLD KAW OWNERS SMILE ALOT
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