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throttle problem

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tonyts50 This post is not being displayed because the poster has bad karma. Unhide this post / all posts.
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mr rip
Scooby Slapper



Joined: 24 Jun 2009
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PostPosted: 22:52 - 26 Aug 2009    Post subject: Reply with quote
it could be any number of things

have you put the throttle slide in the wrong way round?

is the throttle top tight?

when trying to adjust the mixture screw, did you adjust the throttle stop screw instead?

is your cylinder head tightened down properly

are there any air leaks between the carb and the cylinder?

did you use new gaskets when rebuilding it or try to get away with reusing the old one if so were any of them torn?

try a few of those & get back to us
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Ichy
World Chat Champion



Joined: 15 Jul 2005
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PostPosted: 22:54 - 26 Aug 2009    Post subject: Reply with quote
Check that the piston is sitting in the carb correctly, and the needle is going into the emulsion tube correctly, check the throttle cable run for any kinks or trapping.
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stutterin' sam
Nova Slayer



Joined: 19 Jun 2009
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PostPosted: 23:54 - 26 Aug 2009    Post subject: Re: throttle problem Reply with quote
tonyts50 wrote:
ok right just had a bore piston and spark plug now with a new throttle cable also some boysen carbon reeds fitted t the bike

only downside now it its revving to redline 11000rpm and staying there without me even touching the throttle

any ideas ?

Must be 'De Ja Vue' could swear I read this on another thread.

By the way Tony that's a terrible stutter you've got, bit like myself

Very Happy
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mr rip
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Joined: 24 Jun 2009
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PostPosted: 00:06 - 27 Aug 2009    Post subject: Reply with quote
a sticking float needle could cause that if it's sticking closed causing the bike to starve as if it's just about to run out of fuel

as the bike will race just befor it cuts out

to be honest with you I think your problem is to do with having the wrong carb on it but as you admit yourself that you know so little about bikes it could be any number of rookie errors, & the bike might run ok with that carb on as long as it's set up corectly

my advics is still to put the stock carb back on it using the settings that I gave you in your other thread
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Billing
World Chat Champion



Joined: 12 Mar 2009
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PostPosted: 00:17 - 27 Aug 2009    Post subject: Reply with quote
unscrew the top of the carb, take the slide out and turn it 180 degrees, sounds like you've put it in backwards. theres a little groove on the slide, just make sure that its lined up with the peg in the carb body
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binge
Emo Kiddy



Joined: 03 Jul 2004
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PostPosted: 00:33 - 27 Aug 2009    Post subject: Reply with quote
Inside your carb is the carb slide / piston.

These can be put in back to front and go un noticed until you start the engine.

Basically there is a groove all the way down the carb slide. This has to line up with a little notch inside the carb so it will go all the way to the bottom.


It sounds like yours is in back to front causing it to sit at about 3/4 throttle.





Ben
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mr rip
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Joined: 24 Jun 2009
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PostPosted: 00:35 - 27 Aug 2009    Post subject: Reply with quote
take your throttle slide out, check that the needle is in there properly (ie it cant be pushed up into the slide when you put it back in the bike)

then refit the slide making sure the shamfered edge at the bottom faces toward the airbox

& make sure the needle slides into the emulsion tube (needle jet) properly on it's way in
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mr rip
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PostPosted: 01:05 - 27 Aug 2009    Post subject: Reply with quote
befor you refit the slide make sure that the throttle stop screw is screwed almost all the way out so it isnt stopping the slide dropping straight to the bottom then you can adjust it when you get it started up
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Ichy
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Joined: 15 Jul 2005
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PostPosted: 07:20 - 27 Aug 2009    Post subject: Reply with quote
don't lube any part of the carb internals. Just make sure its very clean. The throttle stop screw is what usually controls the tickover speed. Its usually on the side of the carb body.
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mr rip
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PostPosted: 09:58 - 27 Aug 2009    Post subject: Reply with quote
the throttle stop screw is the big one with a spring on the outside of it that screws into the side of the slide housing to adjust your tick over, if you look down the top of your carb you'll see the tip of the screw poking into the housing & will be able to watch it as you unscrew it
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Old Thread Alert!

The last post was made 17 years, 20 days ago. Instead of replying here, would creating a new thread be more useful?
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