Mullet Man Posted December 4, 2006 Report Share Posted December 4, 2006 my bike internal motor is stock. stock head, stock domes. i'm at about 108-110psi in both cylinders when warm. i have a total of about 55-60 hrs on it. should i just re-ring it and go from there? or just pull it apart and have it overbored with new pistons? if re-ring, where is a good place to get new rings for stock cylinders/pistons other then a dealership? (havent found them at RMatv) i'm on a budget here. plus i like to spend as little as possible anyway. (i will be doing all my own dis and reassemble) Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 4, 2006 Report Share Posted December 4, 2006 At the very least, hone the cylinders (you will have to regardless if you re-ring or piston and ring it.) Take it to a machine shop, have them mic the pistons and cylinders. If they are safely within tolerances, re-ring it and assemble. Vito's and Magic Racing carry rings. However...usually rings are about 15 to 20 bucks per piston. You're buying a complete gasket kit, either way. With 50 or 60 hours on it, if you're tearing it down that far, spend the extra 150 or so and get it bored to the next size and get new pistons/rings. I know you're on a budget....but, with that many hours on it...it just makes sense to do it right the first time.... Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted December 4, 2006 Report Share Posted December 4, 2006 Like he said tear it down and take it to a machine shop. If the skirt to cylinder clearance is good have them break the glaze and put a crosshatch back on it. If it isn't worn past manufacturers specs why bore it before it is necessary? Either way works. Quote Link to comment Share on other sites More sharing options...
Mullet Man Posted December 5, 2006 Author Report Share Posted December 5, 2006 (edited) ahh, i didnt think a hone would be necessary for a re-ring with the amount of hours i have on it (doesnt seem like much time to me) i will contact machine shops when i get a chance. might just wait a little longer (save the pennies) and get it ported at the same time... lol psi isnt too awfully low right now thanks Edited December 5, 2006 by Mullet Man Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 5, 2006 Report Share Posted December 5, 2006 You have a little time left. I had 110 PSI beginning of last season on my bone stock 96 motor...beat on it all year. It was tired by year end and beginning of this year. Took quite a few kicks when cold, usually 9 or 10. But, ran great once warmed up.... ALWAYS hone cylinders when you put pistons OR Rings in. Rings need to seat properly, or you just wasted your time. Honing is dirt cheap at a shop, and even cheaper to buy one for yourself and use a drill.... Quote Link to comment Share on other sites More sharing options...
Mullet Man Posted December 5, 2006 Author Report Share Posted December 5, 2006 hmmm, thanks for the idea on the DIY honer. i might just do that, after having it checked out mine is about an 8 kicker when it has sat for longer then a few days. when its warmed up, shee rips and fires on one easy kick sitting on the seat Quote Link to comment Share on other sites More sharing options...
smokin 2 stroke Posted December 5, 2006 Report Share Posted December 5, 2006 WHERE CANU BUY THE TOOL TO HONE IT UR SELFT Quote Link to comment Share on other sites More sharing options...
Mullet Man Posted December 5, 2006 Author Report Share Posted December 5, 2006 i imagine harbor freight would have one for cheap or Jegs or Summit or something Quote Link to comment Share on other sites More sharing options...
csrmel Posted December 5, 2006 Report Share Posted December 5, 2006 make sure youre compression tester is good. try it on youre car or something with a known good engine. i have seen countless compression testers that were bad and only went up to a certain psi, usually 100 or 110 etc. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 5, 2006 Report Share Posted December 5, 2006 For 60 bucks, this is a great tool. http://www.sears.com/sr/javasr/product.do?...UseBVCookie=Yes as for the hone, any auto parts store will have one. I like the BB style, they don't seem to get hung up on the ports as easy as the 3 stone style. Get a bb hone 1/4 to 1/2 inch larger than the bore hole. Quote Link to comment Share on other sites More sharing options...
Mullet Man Posted December 5, 2006 Author Report Share Posted December 5, 2006 (edited) i have one similar to that, also use it to test fuel pressure on my car. as for the hone tool, BB style is that Ball Bearing, any links? i have only seen the 3 stone style Edited December 5, 2006 by Mullet Man Quote Link to comment Share on other sites More sharing options...
smokin 2 stroke Posted December 5, 2006 Report Share Posted December 5, 2006 http://buy1.snapon.com/catalog/item.asp?P6...amp;dir=catalog is this a good one Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted December 5, 2006 Report Share Posted December 5, 2006 The Yamaha specs are in Clymer right? I'm gonna do my 01 soon, but I can't find them in there, same deal, had a PSI around 105 or so, but I wasn't sure how I could tell if it needed a re-bore or just a hone and rings. Anyway I can find out the specs and measure it at home. Sorry to thread crap, but it seams kinda related. :beer: Quote Link to comment Share on other sites More sharing options...
BANSHEEMANIAC Posted December 5, 2006 Report Share Posted December 5, 2006 you can get a hone from advance auto parts or autozone for $30. they come in fine, medium. get the fine, and make sure when you hone it, go up and down with the drill to make the hone marks kinda criss cross. Quote Link to comment Share on other sites More sharing options...
milo_32000 Posted December 5, 2006 Report Share Posted December 5, 2006 For my 2 cents, send to Jeff at FAST, he has the best prices on a a topend kit, get done by a pro, you will not regret it, it`s not worth a major screw up ! milo_32000 Quote Link to comment Share on other sites More sharing options...
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