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2012 KLX250s - power improvements worth the money?

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I hear removing the airbox lid, adding a stage 2 dynojet kit and a FMF Q4 exhaust makes a solid 15% improvement in power... Which means I could go from 18hp to 21hp.

Can anyone verify the power increase with the combo of three mods?

I might spend the money but don't want to do it for only a nominal gain.

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I don't know if it's a whole 3hp increase, but I have done those three mods and it's a much better bike now. Throttle response and overall pull has improved quite a bit. I think they are worth the money, especially if you can pick up an exhaust for cheap.

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That is good to hear.

I ordered a front 13T sprocket for some additional low end performance and a new sprocket was only $13.

When you say cheap exhaust, how I do I find these unicorns? Amazon has a Two Brothers for $268, but I hear you have to buy the noise reduction tip for another $35 which brings the total price back to $300... And at that price eBay has the Q4 for $298.

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Yea I have wanted to try a 13t sprocket, but I do most of my riding on the street and I'm not sure I want it geared down any more than it already is. Everyone seems to say that is one of the best mods you can make.

Edited by Pghxd9

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I've done those exact mods to my bike. Definitely a noticeable power increase that makes it worth it. It is still a klx though so no matter what you do to it the thing will never ooze power. With a 14t sprocket I can wheelie in first if I pump the shocks a little. With a 13t I can almost pull the front up in second gear.

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Good to know the mods help. What I can't seem to get through my thick skull is whether the $300 pipe is worth it. It's $300!!

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And another 60 to 80 for a jet kit. Honestly if you are going to keep the bike for a few seasons it is well worth it. I've got 12k on my klxs and put the pipe on at 3k. It's been more than worth it.

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Go on Ebay, get the $150 DG slip on pipe. Stage 2 jet kit for a klx 300, remove airbox lid, go 14/50 gearing. You will have no problems lifting the front wheel.

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Great advice. Tell me can I ride with the DG slip on in the mountains? Colorado has a 96db limit.

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I don't think you will have a problem, it's really not too loud. Even if you think it's too loud they sell quiet inserts for it.

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Great advice. Tell me can I ride with the DG slip on in the mountains? Colorado has a 96db limit.

That's nuts? Where is it measured from? 1' can make a huge difference.

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Does the quiet core insert work well on the DG? I live in the city and am slightly concerned with having a loud a$$ pipe since it could will draw a lot of attention to where I store my bike.

My gut says the FMF Q4 ($300) is the safest bet, but it's almost double the price of the DG ($159) slip on.

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Man just do a little research of you're own. I guarantee you can find noise tests of both pipes. Q4 is still loud and ppl will notice. Not as loud as a harley but still throaty. Let's just say if the zombie apocalypse is coming I'm going to throw my old pipe back on.

Imo quite being a sissy about it and just buy a f*in pipe.

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Also I can guarantee the Q4 to pass the 96db limit. Part of the reason a lot of ppl use them on trail bikes

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I hear removing the airbox lid, adding a stage 2 dynojet kit and a FMF Q4 exhaust makes a solid 15% improvement in power... Which means I could go from 18hp to 21hp.

Can anyone verify the power increase with the combo of three mods?

I might spend the money but don't want to do it for only a nominal gain.

Ive got an 07'. I have recently put a new MCCT on and an FMF powerbomb header. It definitely has more torque. I need a jet kit but i havnt found any. The MCCT was a good investment, as it got rid of a clack that was present from around 4k to 6k rpm. I recommend getting one when you hit 5k miles. 

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Google it.  There is a download available.  State how to do it.  Also has a chart as each bike has a specific RPM to be tested it.  I can pretty much guarantee you that a FS ranger is not carrying this with him/her.  Run it.

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Harsh comments. Let's abandon the thread.

Clearly my questions were not warranted.

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Don't stop posting because of some crabby persons comments. When I got my klx in 06 it was the first bike I ever rode. I knew nothing so forums like this are important. Remember the adage "there are no stupid questions only stupid answers"

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