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leigh3292
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TUG
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leigh3292
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MarJay
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leigh3292
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MarJay
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leigh3292
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MarJay
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| leigh3292 |
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leigh3292
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 Posted: 15:01 - 17 Sep 2008  Post subject: |
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I CANT find the workshop tho and iam writing in english , i only wanted to find out stuff maybe il go somewhere else who helps and are polite  |
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| skinny |
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skinny
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Jefr0
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| MarJay |
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MarJay
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| Posted: 15:12 - 17 Sep 2008 Post subject: |
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| leigh3292 wrote: | I CANT find the workshop tho and iam writing in english , i only wanted to find out stuff maybe il go somewhere else who helps and are polite |
I am being perfectly polite, and my picture I posted has directions to the workshop.
Ok, because you cannot understand simple instructions like 'Ask in the workshop section' then I will answer your question.
Rejetting is done when other modifications are done to the engine that make the fuelling either richer than standard or leaner than standard. Usually its leaner.
Fitting a sports exhaust, derestricting, fitting a 'performance' air filter, tuning and other modifications usually make the mixture leaner. This means you need a bigger jet.
When this is done, it usually needs setting up on a dynamometer (which is like a rolling road) Or, it needs setting up using frequent plug chops. Plug chops work, but IMO they can be a bit dangerous because you can run the bike too lean and heat seize. If this happens when you are riding you need to be quick on your clutch hand otherwise you'll be spat off into the street.
A plug chop is a method of examining the mixture of a bike. It involves riding the bike a bit, and then removing the spark plug and examining it. If it is black and oily you are running too rich and need to lower the needle or swap the main jet for a smaller one. If it is white in colour then it is running too lean and you need to raise the needle or increase the size of the main jet. You want to aim for the plugs to be a tan colour. This cannot easily be done by an amateur though, and it won't get you that much more performance on a 50cc. If it isn't done properly or not done at all, then you could seize the bike.
My personal opinion on this is that you should wait until you are 17 and buy a 125. Or you can do your test.
This still does not mean that you asked a proper question, or asked it in the correct section or that you are actually speaking English.
TXT Spk duz nt count az nglish dunthca know innit blud?
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another. |
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| Ariel Badger |
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Ariel Badger
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| Posted: 15:13 - 17 Sep 2008 Post subject: |
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| leigh3292 |
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leigh3292
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| Posted: 15:16 - 17 Sep 2008 Post subject: |
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cool people 
and i am getting a performance exhaust thank you very much |
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| Fnatic |
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Fnatic
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| Posted: 16:00 - 17 Sep 2008 Post subject: |
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Right get a performance exhaust.
Then see how it performs. Then buy jets in ranges of 5-10.
For example you may have a 70 in there now....
Buy 80, 90, 100
Try them all and then try 95 if 90 isn't right and 100 is boggy.
It's a guessing game.
The jet is the valve type thing that allows petrol through to the carb.
Too small and underpowered, too big and boggy performance.
*I Think* |
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leigh3292
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bazza
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| Endless Nameless |
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Endless Nameless
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| Posted: 20:58 - 17 Sep 2008 Post subject: |
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Bazza, see my reply to the OP's thread in workshop 
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bazza
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| Ariel Badger |
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Ariel Badger
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| Posted: 21:15 - 17 Sep 2008 Post subject: |
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| Fnatic wrote: | Right get a performance exhaust.
Then see how it performs. Then buy jets in ranges of 5-10.
For example you may have a 70 in there now....
Buy 80, 90, 100
Try them all and then try 95 if 90 isn't right and 100 is boggy.
It's a guessing game.
The jet is the valve type thing that allows petrol through to the carb.
Run it hard and lean your pistom will melt BTW.
Too small and underpowered, too big and boggy performance.
*I Think* |
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| rotax81 |
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rotax81
Nearly there...
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| rotax81 |
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rotax81
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| Posted: 21:55 - 17 Sep 2008 Post subject: |
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| Fnatic wrote: | Right get a performance exhaust.
Then see how it performs. Then buy jets in ranges of 5-10.
For example you may have a 70 in there now....
Buy 80, 90, 100
Try them all and then try 95 if 90 isn't right and 100 is boggy.
It's a guessing game.
The jet is the valve type thing that allows petrol through to the carb.
Too small and underpowered, too big and boggy performance.
*I Think* |
there is your near on correct answer
a good starting point is to leave as is until you mod it.
fit your exhaust.
find your carb size in mm's.
multiply it by 5 and that will be slightly over the jet size you will need.
i.e. 18mm carb x 5 = 90 jet.... i would fit 85 and it will be very close.
before anyone jumps on me i have used that method since i was 16 in 1977 lol.
including setting up my karts i used to race
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| chris-red |
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chris-red
Have you considered a TDM?
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| Jefr0 |
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Jefr0
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| rotax81 |
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rotax81
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| Posted: 10:08 - 18 Sep 2008 Post subject: |
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perhaps he is deaf AND blind 
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ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
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Old Thread Alert!
The last post was made 17 years, 194 days ago. Instead of replying here, would creating a new thread be more useful? |
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