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The Vintage Japanese Motorcycle Owners Group: Discussion Forums

Vintage Japanese Motorcycle Owners Group :: View topic - makin progress, but why does this always happen . 78 550cb


makin progress, but why does this always happen . 78 550cb
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jeepurz
Commuter
Commuter


Joined: May 30, 2006
Posts: 567
Location: west central il.

PostPosted: Tue Apr 07, 2009 8:07 pm    Post subject: Reply with quote

05c50 wrote:
Jeep, the 374-004 are superceded by the 374-000. You'll need 4 sets of 374-000 if the cylinders are not scored or rusted. A simple hone job to break the glaze and stick it together.
By the way, don't tell anyone (I'll probably get flamed for this) but I re-used my rings on my 750a after I honed the cylinders.

...........Paul


my oldest son is 30 he races honda civic mini stock cars, he said reuse em, he's been building motors since he was 17. I prob wont keep this bike long but then again i dont wanna stick some poor schmuck. so far its two say use one says not to. Ill sleep on it for a week or so. Heck the motor will die of old age before I finish it.

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76xs650 78xs650 79xs650 ty175 mr175 cb550
projects xs11 cb400 rt360 cbf750 & a hodakEE.
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Russell
Gear Head
Gear Head


Joined: Nov 02, 2008
Posts: 1085
Location: New Zealand

PostPosted: Tue Apr 07, 2009 9:10 pm    Post subject: Reply with quote

If I re-used rings I think I'd probably use a lower grade mineral oil for the first couple of hundred kms or so to try and ensure enough friction for the rings to seat to the fresh surface on the bore.I've known mechanics to put a used piston and rings into a cylinder on their own tired car engine, no hone of the bore!'Can do ' and 'should do' are very different concepts eh!
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jeepurz
Commuter
Commuter


Joined: May 30, 2006
Posts: 567
Location: west central il.

PostPosted: Sun Apr 19, 2009 3:41 pm    Post subject: Reply with quote

OK heres where im at, STUCK. I read up on cam chain inst over on the sohc board, i may have some kinda prob. Jugs on, heads on when I put the cam and sprocket in as described in the how to I read it worked great UNTILL, I cannot get slack. I should have studied the cam tensioner before I installed it DUH the screw slot on the tensioner doesnt seem to turn, DANGIT!. Im also not seeing timing marks, and im am not ,,, well ok im blind.
can someone explain how this tensioner works . that would have to be the problem and I dont wanna pry on this pully.


heres as close as I can get.


the suspected culprit.

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76xs650 78xs650 79xs650 ty175 mr175 cb550
projects xs11 cb400 rt360 cbf750 & a hodakEE.
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