What type of studs/bolts/allens would you recommend?

[AaronF]

Just wondering your opinion of mounting your engine/muffler with what type of hardware do you prefer that actually holds into place without daily adjustments?

I've noticed that the stock studs that come with the engine kits are no good compared to your average bolts,they strip out easy or they break into pieces.

Any suggestions would be great,Thank You!

[DOC BOLM]

If someone will make a list of the bolts that are needed,i well ask a cousin of mine who ownes a major bolt co.to supply some to me and i will stock them.My cost will be your cost.aircraft bolts and grade 8.HD

[Pablo]

Originally Posted by AaronF

Just wondering your opinion of mounting your engine/muffler with what type of hardware do you prefer that actually holds into place without daily adjustments?

I've noticed that the stock studs that come with the engine kits are no good compared to your average bolts,they strip out easy or they break into pieces.

Any suggestions would be great,Thank You!

The supplied hardware is junk. Mostly soft garbage steel, but sometimes brittle and snaps easily. The worst are the nuts - the threads pull out like butter.

Grade 8 is not necessary nor advantageous for all applications. Anyway, we sell a fairly complete set for under $10.



SBP engine hardware kit

[Venice Motor Bikes]

I've heard that grade 8 is too hard.
The auto industry uses grade 6.

[bairdco]

i don't live in illinois, but i've been to the 6 flags park when i was like, 11, (which makes no sense, considering you're question...) but do a google search for "industrial fasteners." it'll hook you up with every place that sells grade 8 hardware, allen head cap bolts, basically everything you need.

the chinese may be able to get you a cheap buzzbomb, but they don't no crap about how to mount it.

[Bikeguy Joe]

Go to Home Depot and get grade 5 metric fasteners, or get the SBP kit and be done with it.

[2door]

Originally Posted by VENICE BOY

I've heard that grade 8 is too hard.
The auto industry uses grade 6.

Norm,
Grade 8 fasteners are not too hard for our uses here. Grade 9 and higher can be too brittle and can fail under high shock loads but a grade 8 will hold under any stress we'll ever see on a motorbike or a car for that matter. I'm always more concerned with people using stainless steel fasteners. Stainless steel, unless it is a heat treated speciality item is not near as hard as you would think. I always suggest Allen head capscrews because of the limited space around the bolt head on mounts and intake and exhaust manifolds. The Allen heads will fit better and even then I've had to grind away some of the material to get a flush surface for the bolt head. Hex head bolts or standard nuts will often contact the mount, manifolds at an angle and that will cause head failure under extreme vibration or stress. This isn't just my opinion but based on good mechaincal engineering practice.
Tom

[Pablo]

Don't disagree, but if you snap a (true) Grade 5 on a MB, you probably WAAAAAAAAAAY overtightened it. You just don't need to spend the money on Grade 8.

[bairdco]

Originally Posted by 2door

Norm,
...I'm always more concerned with people using stainless steel fasteners. Stainless steel, unless it is a heat treated speciality item is not near as hard as you would think...
Tom

also, stainless steel and aluminum don't mix. if you use SS, you'll definitely need anti-seize compound on the threads, and it's still a bad idea. from my experience, stainless hardware likes to fight every other metal, and when stainless breaks off, it's in there for good.

[AaronF]

Thanks for the suggestions so far.I think I'll give the Allen Caps a go and see how that turns out.Does anyone know off hand the correct sizes of bolts needed for the muffler mounts,front/rear mounting?Only metric bolts can be used or American?As i said I'm no good with identifying the correct sizes of bolts Thanks a bunch!