Yamaha TRX850 Enthusiasts Forum

can any one tell me the various reasons my bike should start running rich after the bafflectomy I would of thought free-er flow would lean it off a bit

could just be coincidence ,, its normally emulsion tubes ,, how many mile has the motor done ????

38000 miles, how much are emulsion tubes on average?

Banger wrote:can any one tell me the various reasons my bike should start running rich after the bafflectomy I would of thought free-er flow would lean it off a bit

Scavange (spell check) gas easier/more freely so it draws in more fuel?
If it´s really rich now and you don´t have a K&N filter you can probably get a few ponies more....and open up the airbox

Tubes are 20 quid each mate, Yamaha or factory pro. I would be amazed if yours weren't showing signs of wear. Mine were at 16K. Symptoms are very jerky, on-off throttle from closed & poor mpg.

G Beale wrote:Tubes are 20 quid each mate, Yamaha or factory pro. I would be amazed if yours weren't showing signs of wear. Mine were at 16K. Symptoms are very jerky, on-off throttle from closed & poor mpg.

But richer after baffelectomy??

G Beale wrote:Tubes are 20 quid each mate, Yamaha or factory pro. I would be amazed if yours weren't showing signs of wear. Mine were at 16K. Symptoms are very jerky, on-off throttle from closed & poor mpg.

thats the fella! is there anything else need changing at same time as the tubes i.e needles etc

I think steves right just coincidence if im true it was a little hesitant from closed throttle before bafflectomy

I've heard rumour that they can wear as early as 5,000kms.
I had mine done 2 or 3 years ago and replaced with Factory Pro and I'm sure mine are worn again at 72,000kms. Might try Dynojets next.

Bob

factory pro ones should last longer because they are nickle plated

Banger wrote:

G Beale wrote:Tubes are 20 quid each mate, Yamaha or factory pro. I would be amazed if yours weren't showing signs of wear. Mine were at 16K. Symptoms are very jerky, on-off throttle from closed & poor mpg.

thats the fella! is there anything else need changing at same time as the tubes i.e needles etc

I just changed the tubes & nothing else. Can't see the needles wearing out on standard brass tubes. They say to change float bowl gaskets but if they're not damaged ???

thanks for that

anyone have a part number for emulsion tubes?

No part number sorry but you might find this thread useful when you replace them.
http://trx850.motomaniac.net/forum/view ... =36&t=1386
The needle jets or emulsion tubes aren't easy to identify from the parts list either.
http://trx850.motomaniac.net/forum/view ... =47&t=2543