less acceleration when i installed air filter and clutch springs

hi guys i have just installed a performance air filter and performance clutch springs, my acceleration was meant to increase but it has decreased. why hasnt it given me any acceleration.

can i fix it so it gives me acceleration.

thanks for looking

try up jettin the carb

Moved to the Cag Forum.

more air coming in demands more fuel to burn; watch your spark plug to make sure you don't run lean as you try bigger jets.

move the clip down pushing the needle up in the carb it will help in accel.

dead easy to do take the top off the carb and slide out the slide and you will see the neelde.

remember when you move the needle you need to reset the tick over as it now as more fuel going in it. you will prob have to turn the screw in a turn or so.

i agree, try moving the clip on the needle jet down a possition, that should take care of things, and for sure check the spark plug to see how well the jetting is!

i think its your clutch springs...i think i can almost garantee that if you switch back your old clutch springs, your acceleration will be back. from my experience(sp) the high stall clutch springs made my clutches slipp like crazy and were just garbage...switch back to the old ones and save up for an adjustable zocchi(sp) clutch

Seems like you guys know your carbs.I have a question.I live in the high desert.Antelope valley calif.I have a cag with pbu sleeper kit (big bore dual boost ported,6 port piston,ada reed,rocket key,jet pro pipe,stack and filter)I have the jet pack.What jet would be the best to run for my set up and altitude.Thanks for any help...

Hi i live over in England so my setting are not going to be any use to you.

If i was you start off rich then slowley lower the jets until max rpms are reached do not go any more or you will be running to lean and could cause the engine to blow.

Hear is a section from a advance carb setup guide. if you want a full copy then email me and i'll send it to you.

johnhosepipe@tesco.net

minimoto.tech@tesco.net

3.6.5 Selection of the correct size of main jet

The correct main jet size should be selected by running on the road, preferably by first starting with an over-large size jet and gradually reducing it.
At full throttle, turn the starting device (choke) on, thus further enriching the mixture and, if this produces a worsening in engine running ie. it reduces engine rpm, it is advisable to reduce the main jet size until you finally get satisfactory operation.



Other signs revealing the main jet is too big are a very dark exhaust pipe, dark exhaust gases and damp spark plugs and an improvement in engine running when the fuel supply is temporarily shut off. In a case where too small a main jet has been fitted at first, and the running with the choke on makes a noticeable improvement, you should increase the main jet size until the conditions mentioned above occur.

In selecting the correct main jet, the engine running temperature should be taken into consideration, quite apart from increases in power and top speed, because lean mixtures cause higher running temperatures.

In a situation where a very large increase in the main jet size is required, remember that the main jet flow cross-sectional area should not exceed the effective area for fuel flow between the needlejet and the tapered-needle tip.



4.2 — Changes in atmospheric pressure and in air temperature

Variations in pressure or temperature cause a change in the air density and consequently a change in the fuel-air ratio and further tuning may therefore become necessary.

A decrease in atmospheric pressure with consequent decrease in air density causes a mixture enrichment and smaller jets will therefore be required.

Altitude variations also produce changes in the carburation and they too cause changes in the air density; prolonged use of a vehicle at an altitude higher than 1500 metres, the carburation of which was originally set up for operation at around sea level, would require a change of jet sizes in proportion to the pressure change.

In this case too, a decrease in pressure should be compensated by a reduction of the jet sizes. Furthermore, a lowering of air temperature produces an increase in air density and consequently a mixture weakening; therefore an increase in the jet sizes is required.

Summarising, we can say that any decrease in air pressure, any increase in altitude or in air temperature should be compensated for by a decrease in the jet sizes.

Conversely, any increase in pressure or any decrease in altitude or in temperature should be compensated by an increase in the jet sizes.