Yamaha TRX850 Enthusiasts Forum

Hello I write from Italy and a few months ago I have a trx 850.

My problem is that the bike has a problem in the opening of gas, a strong on-off which is very annoying.

The bike has 47,000 km and totally original, good preserved.

Thank you all

Welcome Fabio

Correct chain tension and correct throttle cable play would be my suggestion.

Spend $200 and buy 2 keyster carburettor rebuild kits, air cut off valve kit and the plastic air cut off valve cover. It's the round white plastic cover on the side of the carburettor.
The carburettors will need a new kit every 30,000 km due to down draught nature of the carburettor.
The air cut out valve kit and cover should be good for another 15 years.
80% of TRX tuning issues are usually carburettor related.

hello guys..the chain tension and the throttle cable play i think is ok..
I've seen the kit on kedo.com for two carb..
or new emulsion tubes on factorypro.com.
What do you advise?
THANK's

Personally I would stick with Kedo standard kit.
Also look at IGNITECH programable ignition as you'll find good gains and makes for a much more rideable bike especially under 4000rpm.

ok.very thanks..
where i can found a ignitech ignitions?
is already planned or you have to program it?

I order the kit from kedo and when arrived change all...
Thank you to all for the moment ... you very kind

There is also this ... What do you think?
http://www.kedo.com/products/30601.html

Ignition plugs straight in with adaptor loom you also buy from IGNITECH .
Ignition is already programmed for the TRX-TDM 850.
You can just plug it in and ride.
Throttle position sensor needs to be turned on and calibrated using the program disc supplied for optimum performance. Some people don't do this as they are already happy with improvement but makes the bike more responsive when turned on.
Very simple and easy to do. You will need a RS232 lead to plug into the ignition and to your laptop computer too.

thanks a lot...for the moment rebuild all with new kit.
then I could also opt for a ignitech ...but ...just plug it under the seat on the original control unit?

Yes, when you buy just remember to order TCIP4 programable ignition plus adaptor lead to plug into TRX connectors on wiring loom.

thanks cobbadiggabuddyblooo

There is on this website a guide on how to mount it?

thank's