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Just bought a KZ305 and I need help with two thing
- syslogv4
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05 May 2010 07:20 #365694
by syslogv4
Just bought a KZ305 and I need help with two thing was created by syslogv4
I bought a 1987 KZ305 with 15k on it the other day and got a good deal on it. It runs great, fires up on the first try, etc...
However, the bad is a small oil leak towards the front / front left side of the engine. It's not pouring out oil, but I would probably need to add oil weekly to keep riding it.
The only other problem with the bike is that at high rpms, sometimes the gears slip, at above 7k rpms, it might slip, but never below that. It doesn't always slip, just sometimes. Also, when I am changing gears, if I try to shift to quickly, it might slip. Is this a clutch problem?
I think that the oil leaks is from a bad valve cover gasket, if this is what you guys think too, could someone please point me to a tutorial for changing one out?.
I am going to try to do all work by myself, at least on the valve cover gasket.
Any help would be greatly appreciated, thanks!
However, the bad is a small oil leak towards the front / front left side of the engine. It's not pouring out oil, but I would probably need to add oil weekly to keep riding it.
The only other problem with the bike is that at high rpms, sometimes the gears slip, at above 7k rpms, it might slip, but never below that. It doesn't always slip, just sometimes. Also, when I am changing gears, if I try to shift to quickly, it might slip. Is this a clutch problem?
I think that the oil leaks is from a bad valve cover gasket, if this is what you guys think too, could someone please point me to a tutorial for changing one out?.
I am going to try to do all work by myself, at least on the valve cover gasket.
Any help would be greatly appreciated, thanks!
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- BSKZ650
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05 May 2010 07:29 #365696
by BSKZ650
77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
Replied by BSKZ650 on topic Just bought a KZ305 and I need help with two thing
welcome, and it sounds like a clutch issue, I would recomend doing a search here to see if a FSM has been added to the site, but a valve cover is a simple process.
One thought on the clutch slipping, and I dont know the bike very well, maybe someone has changed the oil and used modern car oil,it has additives that can cause a wet clutch to slip
One thought on the clutch slipping, and I dont know the bike very well, maybe someone has changed the oil and used modern car oil,it has additives that can cause a wet clutch to slip
77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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- syslogv4
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05 May 2010 07:49 #365699
by syslogv4
Replied by syslogv4 on topic Just bought a KZ305 and I need help with two thing
I'm planning on changing the oil today... So hopefully it will solve the clutch issue... I sure hope so.
Ill try to find an FSM
Thanks!
Ill try to find an FSM
Thanks!
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- JMKZHI
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05 May 2010 11:23 #365724
by JMKZHI
Replied by JMKZHI on topic Just bought a KZ305 and I need help with two thing
I would do a clutch adjustment as per the factory manual. Sometimes the Clymer manual is ambiguous as to which way you're supposed to turn the adjusting screw. As for the oil, Shell Rotell-T, Chevron Delo & Valvoline Premium Blue would be good to use & they're usually cheaper than other oils. 15w-40 is usually what the auto parts stores have & their ZDDP content is about the same as motorcycle oils & racing oils.
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- syslogv4
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06 May 2010 05:33 #365873
by syslogv4
Replied by syslogv4 on topic Just bought a KZ305 and I need help with two thing
Thank you everyone for the help so far.
I changed the oil last night, put castrol 10w-40 in it (all my auto store had)and rode it to work this morning.
I figured that it will leak about a half a quart every 100 miles or so. It is a pretty severe leak from what I can tell.
About how much is a valve cover gasket....if yall think that this is the problem.
I looked at the engine today after riding, I can see a leak around the top / front side of the engine.
I changed the oil last night, put castrol 10w-40 in it (all my auto store had)and rode it to work this morning.
I figured that it will leak about a half a quart every 100 miles or so. It is a pretty severe leak from what I can tell.
About how much is a valve cover gasket....if yall think that this is the problem.
I looked at the engine today after riding, I can see a leak around the top / front side of the engine.
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- JMKZHI
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06 May 2010 06:09 #365876
by JMKZHI
Replied by JMKZHI on topic Just bought a KZ305 and I need help with two thing
Z1Enterprises.com might have the gasket - it probabaly doesn't cost too much. You kinda have to be careful about what oil to use nowadays, since the amount of zinc dialkyldithiophosphate (ZDDP) in regualr motor oils has been reduced significantly in recent years. Check the MSDS to see what the content is: somewhere in the 1.5-2.0% range is typical for heavy duty diesel engine oils, motorcycle oils & racing oils. The phosphorous in ZDDP is a sort of last line of defence against metal-to-metal wear.
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- syslogv4
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06 May 2010 06:22 - 06 May 2010 06:26 #365879
by syslogv4
Replied by syslogv4 on topic Just bought a KZ305 and I need help with two thing
I got Castrol 4 stroke 10w-40 motorcycle oil, but I will definitely check for the MSDS info, as I'd hate to do some damage to the engine.
Also, I can't find a service manual for the bike...
Does anyone know where I can look at a copy of it? I found one to buy for $51.50, but thats a lot of money for a manual.
Any ideas?
I just checked z1enterprises and they don't have a valve cover gasket for my year bike from what I could find. Any other ideas of where I can find one? I've tried doing a google search, but no luck.
Thank you
Also, I can't find a service manual for the bike...
Does anyone know where I can look at a copy of it? I found one to buy for $51.50, but thats a lot of money for a manual.
Any ideas?
I just checked z1enterprises and they don't have a valve cover gasket for my year bike from what I could find. Any other ideas of where I can find one? I've tried doing a google search, but no luck.
Thank you
Last edit: 06 May 2010 06:26 by syslogv4.
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- JMKZHI
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06 May 2010 06:46 - 06 May 2010 06:48 #365882
by JMKZHI
Replied by JMKZHI on topic Just bought a KZ305 and I need help with two thing
Motorcycle oil will be fine; I'd guess that all of them have a good amount of ZDDP.
Z1 doesn't list everything. If you can't find something, call or email them.
Search ebbaayy for KZ305 manual... maybe there's one listed.
The back outer cover of the factory manual will list the models covered.
Z1 doesn't list everything. If you can't find something, call or email them.
Search ebbaayy for KZ305 manual... maybe there's one listed.
The back outer cover of the factory manual will list the models covered.
Last edit: 06 May 2010 06:48 by JMKZHI.
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- syslogv4
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06 May 2010 07:38 - 06 May 2010 08:02 #365887
by syslogv4
Replied by syslogv4 on topic Just bought a KZ305 and I need help with two thing
Does anyone know the part # for the valve cover gasket? I'm on cheapcycleparts.com and they have diagrams, but I don't know what to look for other than the name valve cover gasket...
I did email z1 btw. Just waiting on a response.
I did email z1 btw. Just waiting on a response.
Last edit: 06 May 2010 08:02 by syslogv4.
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- H1Vindicator
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06 May 2010 08:27 - 20 Feb 2013 20:13 #365894
by H1Vindicator
Replied by H1Vindicator on topic ----
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Last edit: 20 Feb 2013 20:13 by H1Vindicator.
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- larrycavan
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06 May 2010 20:33 #366086
by larrycavan
Replied by larrycavan on topic Just bought a KZ305 and I need help with two thing
As I recall, the 305 motor is a singe overhead cam setup. I havn't tuned on up in 20 years so I can't recall all the details.
Regardless, if it's rocker arm adjusters, there will be 4 caps with O rings on top of the motor. They mount into the rover cover. If the rocker cover is leaking, thay may or may not take a gasket. Sometimes they just call for case sealer on rocker covers.
Check one of the OEM Parts sites with on fiche...
Great littl bikes BTW. Get those couple problems sorted and you'll like that bike
Larry C
Regardless, if it's rocker arm adjusters, there will be 4 caps with O rings on top of the motor. They mount into the rover cover. If the rocker cover is leaking, thay may or may not take a gasket. Sometimes they just call for case sealer on rocker covers.
Check one of the OEM Parts sites with on fiche...
Great littl bikes BTW. Get those couple problems sorted and you'll like that bike
Larry C
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- syslogv4
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07 May 2010 07:30 #366159
by syslogv4
Replied by syslogv4 on topic Just bought a KZ305 and I need help with two thing
I've been riding it in to work this week a few times and my initial guess was wrong. It's not leaking a half a quart every hundred miles, but under a quarter of a quart if not less..
It's not that big of a deal and I'll just keep riding and adding oil until I can figure out the problem.
As far as the gears slipping, it ALWAYS slips at 6k rpms... then if I let off the throttle, and then rethrottle, it always catches and holds.. I'm not sure what it could be, but I need to figure out where a manual is so that I can adjust the clutch and see if that helps.
Thanks for all the help so far!
It's not that big of a deal and I'll just keep riding and adding oil until I can figure out the problem.
As far as the gears slipping, it ALWAYS slips at 6k rpms... then if I let off the throttle, and then rethrottle, it always catches and holds.. I'm not sure what it could be, but I need to figure out where a manual is so that I can adjust the clutch and see if that helps.
Thanks for all the help so far!
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