General info.....carbys and coils

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wal3rotor
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General info.....carbys and coils

Post by wal3rotor » Sun Oct 04, 2015 1:54 am

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...

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dicky
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Re: General info.....carbys and coils

Post by dicky » Sun Oct 04, 2015 2:51 am

Vacuum lines, left to the fuel tap, right to the fuel pump.
Coils bolt directly to the frame lugs, HT lead to the rear.
dicky
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wal3rotor
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Re: General info.....carbys and coils

Post by wal3rotor » Sun Oct 04, 2015 3:03 am

Thanks mate

alextrx850
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Re: General info.....carbys and coils

Post by alextrx850 » Sun Oct 04, 2015 3:21 am

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.

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dandywarhol
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Re: General info.....carbys and coils

Post by dandywarhol » Mon Oct 05, 2015 9:24 am

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 :shock:
1996 TRX 850, blue, Ohlins 46HRCLS, Race Tech Gold Valves, 0.90 springs, Venom pipes, R6 brakes............
1974 Yamaha RD250A, Candy Blue
1998 Yamaha SZR660, blue of course
1967 Yamaha TD1C 250, Blue and white

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