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Retorqueing motor

  • Thread starter Thread starter helmutholderbenz
  • Start date Start date
H

helmutholderbenz

Guest
Just rebuilt my motor and was wondering if I need to retorque my mains along with the head? Thanks, Andy
 
The factory manual has the maintenance schedule, including how often to retorque the head. They don't normally recommend the need to retorque the crankcase screws but it wouldn't hurt.
 
Thanks for the advice. I think I might have a problem though. I went to retorque my head today after putting 465 miles on the motor and pulled the sparkplugs and looking at the tops of the pistons they are wet with oil, no carbon buildup. The head is fresh with new valve stem seals. Does this sound like my rings haven't sealed properly? 1983 Gs750e w wiseco 816 kit
 
tkent02 said:
Could be. How did you run the engine to seat the rings?
Click to expand...

I did like the manual said for the first 2oo miles, didn't go over 4k rpm changing it up a bunch. Then my dynojet kit came in and things kinda went out the window
 
tkent02 said:
Yeah that won't work. Read this:

http://mototuneusa.com/break_in_secrets.htm
Click to expand...

That's a good article tk! Kinda on the lines of break it in on how your gonna be riding it. There are alot of varables in here though. The sleeves were honed with 400grit, my machine st said this was pretty rough for such a small piston and lent me a ball hone to smooth them out a bit. At the time it sounded like a good idea. My rings are new but not wiseco. The pistons are 1980s era xt virsions and you cant get rings for them anymore so I got some cast rings made
 
rapidray said:
The tops of your pistons COULD be wet with gas if it is jetted too rich.
Ray.
Click to expand...

Ray, its not gas. By the looks of the sparkplugs the bike is running lean. I did a wot pull across a bridge and the plugs were pretty white. I called dynojet and asked about the problem and Mike told me white was common on pump gas these days. This was at 350miles. He said run it till my first valve adjust andsee how it was doing and if I wasn't happy I could go up to DJ134s
 
Sounds a little sketchy regarding the rings and hone. 400 is too fine for most common rings. 240 is a good general purpose grit number, 320 for chrome rings. Also, it typically works best to use a good bit of throttle from the get go to seat the rings. Fingers crossed it's just jetting.
 
Nessism said:
Sounds a little sketchy regarding the rings and hone. 400 is too fine for most common rings. 240 is a good general purpose grit number, 320 for chrome rings. Also, it typically works best to use a good bit of throttle from the get go to seat the rings. Fingers crossed it's just jetting.
Click to expand...

Thats my bad I ment 200grit
 
Thanks all for the input, with all this being said, I probably missed my window for seating these rings. At just under 500miles would you think I could get away with another ball hone and a new set of rings or what should I do? Will these rings ever seat???
 
I would think that if you were getting oil in the chamber, you would be seeing some blue smoke and the plugs would show signs of it. Have you checked your oil level to see if you actually are using oil?
 
Yes, there is some blue smoke and I've been having to add oil every 50 60 miles
 
Blue smoke and the need to add oil every 60 miles doesn't sound good. That's pretty extreme oil usage. I doubt the problem relates directly to breaking in the rings too gently. If you had a good hone and proper clearances on the pistons/rings/cylinder the engine should break in reasonably reasonably well regardless. Sounds like you may have to tear down the engine again. If you do so I'd verify measurements on everything. I would inspect the rings carefully to see if they show even/uneven wear spots. That should provide a clue anyway as to what the problem may be. I suspect your new non-wiseco rings may be the root of the issue.
 
Do a leakdown test and stop guessing. Those rings could be reused after doing the honing again if that is in fact your problem. Even old rings that never sealed can be reused after a new honing.

The ball hone is perfect if it's the right size and if it's used correctly.
 
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