Yamaha TRX850 Enthusiasts Forum

what is every one using size wise for the main jet ?? i think mine is a bit lean ,,,i went for a long ride today and on WOT when you throttle back about a quarter it picks up so i am thinking its a bit lean it has ram air pod filters on and a big bore exhaust and quill T3 cans done a search and some are bigger and some smaller main jets main jet is 155 at the moment is there some settings for a std motor ??? HELP !!! O and they are 41s

i have 160 mains

I'm on 170s with foam filters.... And I was on about 148s with the (modded) airbox. 155 sound about right.

i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

I buy all carb related stuff from allens performance (steve)
You can also drill them out, Keihins numbers are mm....155=1,55mm

thanks to all that replied to this and the pm,s ,,,,iam going to give alans a ring see if they have any recommendations

steve speed wrote:thanks to all that replied to this and the pm,s ,,,,iam going to give alans a ring see if they have any recommendations

They also make velocity stacks wich has a bulge over the main air jet/air screw to keep crud out of the carbs/engine.
All their aftermarket stuff is 20£/pc....super service although Steve made a "ohh, what was i thinking" once...

honkdawillydahonk wrote:I'm on 170s with foam filters.... And I was on about 148s with the (modded) airbox. 155 sound about right.

Blimey - I'm on 158s with K&N pods

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

Ooops. Wasn't really paying attention... Does it go better on choke out of interest?

Got my jets from Allens. Bit pricey though..... About £12 a pair!

honkdawillydahonk wrote:

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

Ooops. Wasn't really paying attention... Does it go better on choke out of interest?

Got my jets from Allens. Bit pricey though..... About £12 a pair!

Cheaper than a holed piston though

Kayla wrote:

honkdawillydahonk wrote:

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

Ooops. Wasn't really paying attention... Does it go better on choke out of interest?

Got my jets from Allens. Bit pricey though..... About £12 a pair!

Cheaper than a holed piston though

It's not exactly a FSIE....

honkdawillydahonk wrote:

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

Ooops. Wasn't really paying attention... Does it go better on choke out of interest?

Got my jets from Allens. Bit pricey though..... About £12 a pair!

Choke on FCR41s?

If you need FCR jets cheapish, Alex at: smebike@ihug.co.nz has supplied all of mine at about £6.00 per pair delivered from NZ - everything I've ordered has arrived withing 5 days..Top Bloke!

G

phuk72 wrote:

honkdawillydahonk wrote:

steve speed wrote:i cant see how 155 can be right because as i said as you roll the throttle back from full it picks up so to me thats lean where,s the best place to get some more jets ?

Ooops. Wasn't really paying attention... Does it go better on choke out of interest?

Got my jets from Allens. Bit pricey though..... About £12 a pair!

Choke on FCR41s?

Road ones have a choke don't they?

honkdawillydahonk wrote: Road ones have a choke don't they?

Dunno? Not seen any with a choke?