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Is their any benefit to K&N style high velocity filters on an SP2 RC? From what I understand, that low RPM surge is a RICH surge. In fact, from what I've been told, the RC is conservatively rich through much of it's powerband. I'm keeping a tight reign on spending now, so a power commander is out of the question, but air filters might be a go.

John
 

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I wouldn't do it. From all the tests that have been done on aftermarket filters and the 51, the stock filters flow more than enough air. The k&n's can actually hurt performance more often than not. If you absolutely have to have them then go for it. If I were you I would save alittle longer for the power commander, it is every bit worth the $249 you'll pay for it.
 

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guys which power commander ?2 or 3?..
 

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Lead your my pal buddy but I just have to say.


MightyMax....unless your running sato's or moriwaki's thos maps above are useless. But if you are running those cans I heard they are badass maps and I can attest to that cause my buddy lead is running them on his bike and that thing moves!!!
 

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Hi j. Thanks for the compliments.

Check the first one listed for stock parts and a good tune. My tune came from the same person. He is well known in the RC51 world. Make sure to check your year. Try different ones as you will never know what might work best for your bike. Ask jgos. I think he uses a Yoshi tune? for D & D pipes. I know even a tune for a stock bike should make drivability better, especially off idle, and it will feed the motor more timing and fuel throughout the RPM band.
 

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Hi j. Thanks for the compliments.

Check the first one listed for stock parts and a good tune. My tune came from the same person. He is well known in the RC51 world. Make sure to check your year. Try different ones as you will never know what might work best for your bike. Ask jgos. I think he uses a Yoshi tune? for D & D pipes. I know even a tune for a stock bike should make drivability better, especially off idle, and it will feed the motor more timing and fuel throughout the RPM band.
I couldn't agree more. PcIII was the 1st mod I did and with a tune for a stock bike it ran alot better. I am using the Yoshi map for my d&d's and it runs great. No popping anywhere so I know the fueling is right on. Only issue with the 3usb is that unfortunately it doesn't adjust timing only the fuel trim. Now the 3r will adjust both but I don't think you can buy the 3r anymore unless you find one used. Dynojet is supposed to be coming out with an add on to the 3usb that will allow you to adjust timing. But anyways I highly recommend a pcIII. Its a great investment and is definately worth the money.

Whats up bro what you got goin on this weekend for the holidays?
 

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Got my moms for lunch and my dads for dinner. I'm off on Friday but the wife isn't so I'm probably just gonna tool around the house all weekend. Might take the race car out on Sunday though !!!

That link don't work
 

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I'm usin Slip on Scorpion race cans...tks guys helpin me..i will let the RC51 member in S'pore know...
 

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I have a set of K&N's and they basically paid for themselves, if anything the mod is well worth it for that reason. Why keep buying air filters if you can just buy one set that last the entire life of your bike. I've been seeing many K&N's going for dirt cheap on Ebay.

Just a thought, can't say I've noticed a huge gain in performance, but I bought them to save money. I've since put them on my truck and my car as well.

I also have a Scott's permanent oil filter which I think helped save money in the long run. It's well worth the investment in my opinion.

A power commander is definitely a great mod though, I got lucky and the RC I bought already had one on it. But, like everyone else has said, if you want performance gains get the PC. But, I can't honestly say that the K&N's didn't save me any money. Basically all if ever have to buy now is new oil, the rest is covered.

:D:D:D
 

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The PCIIIUSB is a modular system now, so you can attach the timing module, quick shifter, and who knows what else in the future.
They even have a USB hub or switch that everything connects to.

Unless you know what you're doing, I wouldn't bother with the timing adjustment on the PCIIIr or PCIIIUSB timing module.
That feature was added at the request of race teams and is not really needed for the street.

Misadjusting timing on today's engines will at best lose power, and at worst destroy an engine. Too far either way with cause the engine to ping and/or overheat.
 

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I just ordered a k and n filter for my sp1 I wish I would have read this forum first. I would have just bought a stock set and saved $40. I have a 2001 and the stock filters can't be cleaned because they have some kind of adhesive on them that collects the dust. after 2001 my manual says to just clean the stock ones with compresed air. so sorry mud if you have a 02 or newer you didn't save any $
 
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