Yamaha TRX850 Enthusiasts Forum

Some of you may remember i questioned the crap that we all find in our carbs and from where it was coming!!

Some photo's to jog your memory

The crap, which i believe is rubber from the rear tyre, flung onto the engine and then sucked into the carbs


The see through standard Yamaha filter


The issues as I see them....


Well my solution was to fit a crank case breather/filter, like thus, you can see the standard Yamaha sucker on the right still fitted


Well today was carb day at the Smith house, and i was itching to have a look at the carbs innards
After 500ishK's the difference is obvious, carb on the left "Yamaha" breather = crap....carb on the right an aftermarket crankcase breather = No crap
Yep i have now fitted the other aftermarket breather to the recalcitrant carb

Well, there,s food for thought...without doubt the paper style filter has done its job well..ineresting to what the rubber type of crud it is and where its coming from..tyre..yeah....what about old rubber tubeing delaminating...something thereabouts...at least its not coming from the slides and a filter fixes it..well done

I still think it's the tyre as the rubber I tear up has got to go somewhere Much like the reason for the MX goggles i wear, they protect me from the dirt/mud/crap the tyre throws forward that i eventually ride through. I surmise that the rubber thrown forward has to go somewhere and as the carbs are sucking air......It would be interesting to see the innards of someones carbs from a bike that has a rear huger fitted (after cleaning the carbs first )

Don`t do rear `hugers` myself, I like petite butts on my wimmin. (read your post again)

interesting, and presumably all sorts of coarse dust could work its way in there too, which could there conceivably work its way into the needle jets and cause the needles and jets to wear out prematurely.

well done Rod...next round of coffee is on me

Mincehead wrote:Don`t do rear `hugers` myself, I like petite butts on my wimmin. (read your post again)

Oh "g" here is the extra you were asking for

cobbadiggabuddyblooo wrote:well done Rod...next round of coffee is on me

Do you have my special coffee

Interesting find, good detective work!

Better pull mine apart & see how they're going...

yes mate...Janets neice and partner who's a pilot in New Guinea right but the other two...well I got 5 other types now to try

well, last week i pulled my carbs apart and found them chokka with the black stuff and put it down to the wear from the slides. it felt the same as plastic more so than rubber...but you throw up an interesting alternative....mike

ritza wrote:well, last week i pulled my carbs apart and found them chokka with the black stuff and put it down to the wear from the slides. it felt the same as plastic more so than rubber...but you throw up an interesting alternative....mike

If your slides wore at that rate then you would have to replace them at the same time as your tyres

Maybe he slides around on his tyres.. Now there's a thought.. Doin a bit of drifting on 2 wheels would throw up plenty of charf