Jetting ?

05GSXRIDER said:

as far as the clutch, reed spacers, ring , and can go No, If you are interested give bill a call or pm he will glady answer any questions about his products for you.

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BADREV600 said:

05GSXRIDER said:

as far as the clutch, reed spacers, ring , and can go No, If you are interested give bill a call or pm he will glady answer any questions about his products for you.

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Not so fast there... If i put spacers in, i'd re-jet. If i put on a can, i'd re-jet. Now we're talking both, plus a head... Big Changes for sure

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BADREV600 said:

To my knowledge, spacers work by increasing crankcase volume, ie more air into the transfer ports. More air/same fuel= Leaner! Cans i'm not sure why they tend to go lean, think its cuz they raise EGT's but still man, check plugs any time you add either of these mods. One or two out of ten will need to make changes, Guarnteed!

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djm said:

BADREV600 said:

To my knowledge, spacers work by increasing crankcase volume, ie more air into the transfer ports. More air/same fuel= Leaner! Cans i'm not sure why they tend to go lean, think its cuz they raise EGT's but still man, check plugs any time you add either of these mods. One or two out of ten will need to make changes, Guarnteed!

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Bad, you might want to add a couple more principals to your back ground.... one is Bernoulli effect with respect to carburators....

More air flow increases air speed across the venturi... which lowers the pressure in the airflow path, resulting in more fuel being pulled in. If you increase the airflow you tend to automatically get more fuel.. so the engine in general won't go lean... particularly for the small increases in air flow that reed spacers would give you... as long as you are in a linear flow area of the carb, the increase in fuel is proportionally the same as the increase in airflow.

I believe the reason that the air flow may increase when you add spacers is due to the fact that you unrestricted the end of the reed valve.. (on series III doo engines the reed tips are right up against the cylinder) You want to avoid increasing the case volume.. as much as possible to keep the gas velocity high...

That is why the 1/4 spacers are better then the 0.4 spacers that doo used originally. They unshroud the reeds but don't increase the volume to where it hurts flow.. And The latest series of V Force reeds are shorter yet and need no spacers...

With respect to exhaust canisters... usually the only time you need to add fuel for one of them is if the manufacture reduced the outlet sizing.... trying to give you a horsepower increase.. and retaining heat in the engine.. There are some acoustical wave issues that can get in the way too.. but in most cases that is not the issue.

While it's always good to check your plugs often.. no matter what your doing; silencers (a misnowmer since most of them increase the noise levels) most of them do not require jet changes nor do small increase in air flow.. require jet changes... If you needed a jet change after adding these components you probably needed a jet change before doing so... of course there are always exceptions to the rules.. and one is better off to start rich and lean down by reading plugs and piston tops.

That said, if you are buying a number of products from Bill, he will steer you in the right direction for the typical jetting for these components on a typical engine. Everyone needs to be aware of your own situation.. could be that mice or rats stuffed your exhaust canister with dog pellets over the summer.. and your exhaust restriction went out of sight.. heh-heh...

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