Yamaha special main jets

[hypermax]

Yamaha special size main jets

Don't know if anyone knows or cares but Yamaha makes I guess what would be called half size jets. E.g. between 150 and 152.5.
They are used in carbureted snowmobiles. Could be used for fine tuning a Vmax. Here are sizes in the Vmax main jet range and part #'s

JET,MAIN #145
3G2-14231-29-00

JET, MAIN #146.3
3G2-1423E-58-00

JET,MAIN #147.5
3G2-1423A-80-A0

JET, MAIN #148.8
3G2-1423E-59-00

JET,MAIN #150
3G2-14231-30-A0

JET, MAIN #151.3
3G2-1423E-60-00

JET,MAIN #152.5
3G2-1423A-81-00

JET, MAIN #153.8
3G2-1423E-61-00

JET, MAIN #155
3G2-14231-31-00

JET, MAIN #156.3
3G2-1423E-62-00

JET, MAIN #157.5
3G2-1423A-82-00

JET, MAIN #158.8
3G2-1423E-63-00

JET, MAIN #160
3G2-14231-32-00

 

[PATMAX]

I'm bookmarking this post. Thanks Pete!

 

[one2dmax]

Do you know if these are small round head? Probably not needed to be that fine but it's something to think about. You can also use some dynojet jets to get sizes that are effectively in the middle too.

 

[hypermax]

Yes Sean, small round head. Notice part number prefix the same as say a 150. The suffix number designates the size. I used to drag race snowmobiles and had a jet box full. I was told you can't buy these from Mikuni as they were made special for Yamaha.

Do you know if these are small round head? Probably not needed to be that fine but it's something to think about. You can also use some dynojet jets to get sizes that are effectively in the middle too.

 

[hypermax]

Bump,
I filled in conventional size jet part numbers in original post.

 

[Traumahawk]

Thank you for posting this....Ive saved it in my file for Vmax information.

 

[sdt354]

Tks for posting this Hypermax. Any info is useful.