Yamaha TRX850 Enthusiasts Forum

Hi all
Still sorting out the trx I managed to get a good set of carbys from a forum member so that was a bonus.
I'm chasing a bit of info to try and finish a few things off. Firstly can anyone tell me the correct vacuum line connections from the carbs? The right carb has a vacuum outlet on the side- no idea where it goes, and the left carb has a vacuum outlet underneath. Again, unsure of where it should be plumbed to. I also need the plumbing for the fuel diaphragm.
On another note, the coils. Do they mount directly to the existing chassis tabs or should there be a bracket also? So the wiring connections face the front or rear of the bike?


Cheers all hope to have finished photos up soon...

Vacuum lines, left to the fuel tap, right to the fuel pump.
Coils bolt directly to the frame lugs, HT lead to the rear.

Thanks mate

Origional carbs will have engine coolant running through them as well.
Not really needed unless you are in freezing conditions.
One of the first to be blanked off....the tubes run from the right side of the cam cover down to the right side of the right carb...exiting on the other side lower and up into the left carb..and out there to the tee piece of the left coolant pipe.

alextrx850 wrote:Origional carbs will have engine coolant running through them as well.
Not really needed unless you are in freezing conditions.
One of the first to be blanked off....the tubes run from the right side of the cam cover down to the right side of the right carb...exiting on the other side lower and up into the left carb..and out there to the tee piece of the left coolant pipe.

Doesn't need to be freezing to need the carb heated - Carb icing is a phenomenon due to the moisture in the incoming air freezing as heat is drawn out of the mixture prior to vapourising. It can occur at 10 deg. C. I've seen ice balls form in car carbs just because the hot air pipe to the intake manifold has come off