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I have used grade 8.8 bolts, and still had the breakage problem! The most important thing is mount angles!
I will NOT mount a engine with the stock OEM studs. I also use red locktite and either double nut or use nylon locking nuts. 5 builds nar a problem with the mounting. Like I said before PROPER mount alignment IS A MUST.
Last edited by Al.Fisherman; 07-02-2010 at 11:22 PM.Ron ><)))))*> Calera, Alabama
Pre install HT tips
A doctrine fostered by a delusional, illogical liberal minority, and rapidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.
Of course, that means whatever fabrication is necessary to make the front mount fit properly and even the back one if absolutely necessary.
I've personally never had a problem with stripped threads or broken studs anywhere on my engine. (I don't use a torque wrench either and never have except on car engine head studs.)
In fact, it's never missed a beat, except for a stuck slide.
Last edited by AussieSteve; 07-03-2010 at 09:18 AM.... Steve
04-15-2012 #64Motorized Bicycle Member
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Im not sure but ive seen alot of bikes sold with a rear tube of 1.250 thousand and then it spreads the studs and cracks the case too.. On brand new bikes never really rode? Im working on a good machined fix for this, just might cost me $750 for a nice milling machine, My bike has 1.125 tube so no problem for me, I hope...
They have a new mount system out now. I think I thought of it first, just never built one. Needed this type of system when I built a Micargi D.I.Y. kit. The M-50 frame was/is NOT made for these china made engines. I had to do a lot of mods to make it work. Then it was stole in Utah It's in the "stole bikes" forum. I have had another one stole 3 weeks ago here in LA CA. I'm tiered of building great bikes for thieves!!!
By gone_fishin in forum 2-Stroke EnginesReplies: 1Last Post: 05-22-2010, 10:43 AM
By Proboscis in forum 4-Stroke EnginesReplies: 11Last Post: 10-05-2008, 05:56 AM
By robo5050 in forum FOR SALE - Motorized Bicycles & PartsReplies: 4Last Post: 08-08-2008, 04:34 AM
By andrewflores17 in forum 2-Stroke EnginesReplies: 3Last Post: 02-21-2007, 12:55 PM
By cedric in forum Frame Mounted Bicycle EnginesReplies: 19Last Post: 01-31-2007, 02:14 PM