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bluebike1999

Worn Carb body, another busted plate(pics)

8 posts in this topic

my slide plate craked about a year ago, and seeing i knew it was a common 99 problem i was surprised to get to approx 22000 km before it happened so i replaced it and its happened again 12 months later

Upon closer inspection, we noticed a couple of 'ruts' worn in the body and you cant buy just the body and a new carby costs a gazzillion dollars.

carb-1.jpg

another thing, i know there has been issues with which way the seal on the slide should be fitted...facing with the flange facing away from the plate or facing the plate???

DSC00218Small.jpg

so, how do i 'fill ' the ruts?.. thought of getting bigger wheels on the trolley thingy (needle valve) but i think a more logical solution is required

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another thing, i know there has been issues with which way the seal on the slide should be fitted...facing with the flange facing away from the plate or facing the plate???

Yes, in my opinion in makes all the difference. the rubber O ring is actually slightly V'd. I believe it acts as a damper between the slide and the plate. There are a lot of pulses hammering the plate around. if you install the o ring backwards, it has zero damping effect, and I believe this causes so many 2nd throtle plates to break so soon. I have a pic from an old thread, i'll see if i can find it.

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Here it is. This is my own diagram and my own theory. I never did find any documentation to back it up, but I think it will make sense to you. One way the O ring does nothing, the other way it provides a cushion between plate and slide. They wouldn't put it in there for no reason, so it must be a damper.

throttle_plate_1.jpg

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Frostbite

thanks once again...it is one of those 'aha' moments and you have nailed it on the head.

just waiting for one of those $130au tiny little flat plates to arrive and then its away again

call in and say G'day here if you get a chance

www.trailriderz.com.au

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Frostbite

thanks once again...it is one of those 'aha' moments and you have nailed it on the head.

just waiting for one of those $130au tiny little flat plates to arrive and then its away again

call in and say G'day here if you get a chance

www.trailriderz.com.au

That may not be as far fetched as it seems. A couple of years ago I went to Jerez, Spain for the first MotoGP of the season. I'm thinking that Philip Island may be my next destination. I'll definitely give you a call if I'm in the neighborhood.:)

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The grooves in your carb body are not too bad, I have seen much, much worse.

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