Engine Mounting Bolt Size??

[ksowin87]

Anybody know what the diameter of the engine mounting bolts are?... I used a micrometer and fount it was close to 7/16 so I went to lowes and bought some and came back and no-go!! they were too big... the next size down is 3/8 and i tried one and it seemed like it wasnt as snug as it should be??? I need the diameter so i can get them so i can ride!! Any ideas???:argh::argh:

 

[Gen1Pat]

Go to a machine shop. Many places carry a full supple of metric and sae bolts and fasteners. If you're really desperate, get hardend threaded rod, lock washers and nylon lock nuts. That way you can cut the rod to length. Also, MOST hardend bolts and threaded rod are blackish in color. I can't remember what grade the factory engine mount bolts are, but I wanna say they are no more the grade 8.

 

[beastlywarrior228]

Yeah kyle lives in the middle of nowhere the nearest on is probably an hour away lol

 

[1998yamahawarrior]

Hell man Im pretty sure I got an extra set of mounting bolts, left over from my old red one.

 

[ksowin87]

Yeah kyle lives in the middle of nowhere the nearest on is probably an hour away lol

Ha Ha! Nice one!... Thanks though but after a couple trips to some hardware stores and a micrometer i found the bolts to be metric 10mm! Fit nice and snug!

 

[dreded]

cant believe how hard it is to find bolt sizes for these machines.. when I need a bolt size for my honda or kawi I just look it up in the OEM parts catalogue things found all over the net... The Yamaha one for warrior 350 just says "Flanged Bolt" for every damn bolt

Thanks for the M10 info I believe its a M10x70(roughly 3inches long) now I just need to find out what all the plastic mounting bolts are and skid plate mounting bolts

 

[Gen1Pat]

Always remeber 3/8 is slightly smaller than 10mm. And nearly all jap bikes use, 6mm, 10mm and 12mm diameter bolts. For ceratin big stuff you may see 14mm. And if memory serves they all use 1.25 thread pitch. And socket sizes range from 8mm, 10mm, 12mm, 14mm, and 17mm. Wheel hub nuts are usually 22mm. It's pretty much like jap cars/trucks.

 

[YAMAHAULER]

I got the three lower engine mounts bolts for sale

 

[dreded]

Always remeber 3/8 is slightly smaller than 10mm. And nearly all jap bikes use, 6mm, 10mm and 12mm diameter bolts. For ceratin big stuff you may see 14mm. And if memory serves they all use 1.25 thread pitch. And socket sizes range from 8mm, 10mm, 12mm, 14mm, and 17mm. Wheel hub nuts are usually 22mm. It's pretty much like jap cars/trucks.

from my experience they typically use the pitch that is standard for the bolt size.. so a M8 uses 1.25 and a M6 is 1.0 etc couldnt say if thats what Yamaha has done but my honda and kawi are like that which is nice cause I can always get bolts at HW store for the 3 engine mount bolts it cost me a wopping $3 including nuts and washers

When I figure out what all the bolt sizes are ill post here... I have old ones to compare to so shouldnt be tough will just take a couple extra days as Im not making a special trip for it