Yamaha TRX850 Enthusiasts Forum

These are original Yamaha downpipes.
No blacksmoke when i rew the bike ,the sparkplugs looking god,normal motor temperature.
Maybe the blueish pipes have something to do with the tcip4 advance timing settings?
Any suggestions?
https://1drv.ms/u/s!AucFk9sVjq9AhDvTqZ9OrA50W9cL

You nailed it your now getting close to a complete burn on your fuel.
Due to the advance your chamber is burning more of the A/F mix , more heat, more pressure , more power...
I was only looking last night at some dyno results I have for the std trx with and without the Ignitech.
There is a gain of 2hp+ to 4000rpm then 4 Hp gain at 4300rpm which tapers off to 5000rpm to 6000rpm where it’s around the same as the std ECU.
Then it tapers up again and from 6500 to 7500 there is another 2.5hp gain

+1 on Cobba. Nothing to worry about, rather the opposite.

aaaaand just check your idle jet screw is 2 to 2.5 turns out, as these are sensitive at idle and will cause the exhaust to turn blue if to lean, not a big issue, just worth a check. If it's to lean at idle you'll know, when sitting at the traffic lights for a minute it'll hesitate when you then take off at normal throttle.

Ok,thanks everyone.
Good to hear.
The bike runs mutch better after the
tcip4 installation,a clear difference indeed.
The next step will be to sync the carbs,and after that I will break the sound barrier