XL350 side port Mikuni carby spec's

[090]

The carby I have was jetted for a 420 but it has a stocker in it at present so it is running rich. I thought I would go down on the main but it had a Kehin jet in it so I don't know where it is at. It said 75 on it but also worried it was drilled out (shit of an idea who ever thought of that).
Any one have a starting point?

[lc4]

Standard Main jet for XL350 is 130,slow jet 48 (Keihin PW32)
Sorry can`t help with the Mikuni

[fatboyracing]

Hi Brad,
My xl350 with a 420 kit has a mikuni carby and I pulled it apart today to check what I have been running . It has a 180 main jet I hope this helps

Cheers
Fatboy

[sudman]

I ran a 160 main with 36mm carb on a standard engine with big header & pipe. I also ran a 38mm carb with the same size jet just more top end & less bottom end.

[090]

Thanks guys, that helps heaps.
The other motor I have that is suppose to be a 420 seems to have a modified honda piston. I would expect it to have an after market piston in there. any one have bore and stroke spec's?

[VMX247]

87mm XR/TRX400 white bro piston kit in our XL350-normal stroke. 
cheers S&A WA

[TT]

Hey Brad, I think there might be some useful info here for you.
http://www.oldrice.com/CarbStuff.htm

[090]

Excellent Tony!

[sudman]

87mm XR/TRX400 white bro piston kit in our XL350-normal stroke. 
cheers S&A WA

Is there much you have to do to fit this piston other than a rebore to suit?

[VMX247]

87mm XR/TRX400 white bro piston kit in our XL350-normal stroke. 
cheers S&A WA

Is there much you have to do to fit this piston other than a rebore to suit?

That all.... Not a lot of liner left once you run the boring tool through.

I think the last piston was a Wiseco from Ballards

Cheers
S&A - WA