Topic: carb boot with pictures (just had idea)

[cb650 bobber]

if you have them that would be great....i will pay freight.

[cb650 bobber]

I am probably just going to buy new ones.

[cb650 bobber]

does anyone know what material the carb boot is made of ...rubber...but is it gas and air what psi etc.

[Blueridgerunner]

They are rubber. They get harder with age (unlike the rest of us  ). I replaced mine, but the new ones didn't seem a lot softer than the old ones. Cost me about 20.00 each. When you get them spray inside with silicon spray to help get 'em on.

[joeb]

At least with the new intakes you can tune the carbs, with the cracks in the boots you would be about as successful not getting your leg wet p%$##ing up wind.  

[heffay]

does anyone know what material the carb boot is made of ...rubber...but is it gas and air what psi etc.

what do you mean... and why?

[mystic_1]

I took that to mean "how much pressure (or vacuum) must the rubber be able to withstand".

mystic_1

[cb650]

FYI Be sure to get the right year 650 rubbers.  81/82 carbs are bigger then the 79/80.

[scadaman29325]

At least with the new intakes you can tune the carbs, with the cracks in the boots you would be about as successful not getting your leg wet p%$##ing up wind.  

Right on, good buddy.  I think that my carbs were adjusted with the bad boots, and now that I have good ones (no holes) it has problems. I'm running it WITHOUT the airfilter temporarily, just so it will accel better.

I'm working up the nerve to adjust the carbs... They are a little mysterious to me. Yeah, I sort of understand air/fuel mix, but actually tweaking the carbs makes my head hurt!

Later, Phil

[78 k550]

i believe 78k550 may know where to get your boots for around 8 dollars each... maybe, not sure... just the messenger

My rubbers where from the dealer. 8.00 each. They where for my 77 750F

See ya on Sat.


Paul

[Buber]

There is easy way and the hard way. Hard way is being discussed - go and find yourself replacements for x amount of cash. Now, the easy way is to do them yourself. I did it, so I can tell.  Go to the automotive shop with one boot to measure the diameter. Find a spot where they store hoses from the cooling system. Find the REINFORCED hoses for hot water. Match the diameter (may be a weenie bit smaller) buy required amount (for peanuts) cut it up to the size, heat it up a little and oil it (for easy assembly) and you are good as new.

I sold that bike, but I know that it still runs on those rubbers - it will be like 7 yrs that it's running this way... 

Good luck!

[TwoTired]

There is easy way and the hard way. Hard way is being discussed - go and find yourself replacements for x amount of cash. Now, the easy way is to do them yourself. I did it, so I can tell.  Go to the automotive shop with one boot to measure the diameter. Find a spot where they store hoses from the cooling system. Find the REINFORCED hoses for hot water. Match the diameter (may be a weenie bit smaller) buy required amount (for peanuts) cut it up to the size, heat it up a little and oil it (for easy assembly) and you are good as new.

I sold that bike, but I know that it still runs on those rubbers - it will be like 7 yrs that it's running this way... 

Good luck!

There is a difference between running and running correctly.  The stock carb boots are stepped tubes so that the inner diameter runner remains constant.  You don't get that with water hose.  And the steps in the inner wall create turbulence that effects performance and mixtures under certain RPMs.

It is also NOT universally true that all radiator hoses resist the effects of gasoline.  There are myriad formulations of rubber that vary from vendor to vendor.  You can trust that they will resit glycol and water.  The vendor expected that.  But, using them in a gas environment makes you an experimenter, outside all manufacturer recommendations.  I don't blame you for selling that bike.  It's someone else's problem, now.

Cheers,

[Buber]

OF COURSE you are right, when it comes to technical correctness, etc. I'm just poiting an easy way out, since I read that author needed the bike on the road, not in the shed. Yes, there will be turbulences, BUT a) this is not a racing machine tuned to the max performance, b) some trubulences actually are good - to swirl the mixture more.

So, while I'm not denying that you are right, I still say, that there is a difference between bike in the shed waiting for parts, and bike on the road and running... and you can still wait for the parts to arrive, and even drive on your bike to pick them up 

P.S. - when I was selling that bike I pointed out everything that I knew of. And the buyer lives close, and is a happy with this one (as far as I know)... I simply undertook the trouble to find a newer example for myself