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Well, sell your bike for like $1600 and use the $600 towards a good used 85. There arn;t many real porformance parts that make it faster. You could get big bore kits, but they cost alot and they will give you more power, but I don't think its worth the money. So sell you bike and buy a good used 85, or whatever you can find for around $2200.
the best way to go is to get a YZ 80 their much more powerfull and bette rthen a TT-R. for about 2000$ u can get a good 80.
I have a 2002 ttr 125L. A FMF Power Core 4 pipe. ($150) I have had good luck with it. Make sure and change the pilot and main jetts. The first gear i like a tractor, it has plenty of power but no speed. I change the back sprocket to make it go faster. ($60) I bought a wesico piston. It gives about 1 more horsepower. The bike only 10 horsepower stock, so that would give it about a 10 percent horsepower increace. ($80) I put BBR front fork springs and back shock. The fork and shocks and 30% stifer (front $70 back $80) I have made a frame cradle. They are easy to make. At the end of my second year of racing the engine started to bend, because there is no tye around the front of the bike to the back of the bike. (BBR frame cradle $140). I have put a direct shifter on my bike, it seems to shift (cleaner.) ($35) I went through 3 regular chains. The regular chains seem two wear rapidly. I have an o-ring chain,they are great. I have had mine for a year and only changed it once. ($65) I had the stock air filter and I cut some plastic off to let it breath better, they say it causes the engine to sputter every once in a while, but I couldn't notice much. I bought another stock air filter and didn't do anything to it.
I am 14 years old and I ride almost everyday. I have raced for two years and going on the third in the mini 4-stroke class.The bikes are very tough. I have just kept basic mantiance on it and haven't had anything go worng. One time I was riding and ended on an edge of a lake. Everything was under except the handle bar and that was just because i was holding them up on shore. My dad got my bike out and we let the water out the the air filter and let it dry. In the next few days i was riding it again.
Here are a two great sites.
The cheapest way to get more power out of your bike is to get a new pipe, just make sure you change your jetting along with it. You can get an FMF PowerCore 4 and header for $200. Also, if you haven't done so take off your airbox lid, and change out your airfilter with something less restrictive then stock like a UNI. So, about $200 for the pipe, $20 for jetting, and $30 for an airfilter and you'll be set. My friend put a PowerCore 4 on his wifes bike and it made a pretty big difference.
you should do what most said by a 2 Stroke 80/85. i have a 2003 cr85r and its very fast. no offense but the ttr125 is a starter bike. my friend had one and it was alright because of electric start on the ttr125le. There isnt much you can do to make the ttr faster faster. and yes when you said is a 80/85 faster then a 125 four stroke. TTRs arent meant for speed they are ment for trail rides. so if its possible keep that and also get a 2 stroke mottocrosser.
A whole bunch!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Sorry to say, but the TTR125 was designed to be an entry level playbike...it was never meant to race. At 14, it's time to move up a bike or two...If you weigh over 125 lbs, go get a Kawi KX100...If you are tall enuff to touch ground, get a 125 mx'er...the KX100 is a 3/4 scale bike, and a good one, but not suited for riders over about 5'6", or riders over 150 lbs...All the late model 125 mx'ers are good bikes, just dont buy one that has been beat to chit...If you ride the woods and trails, and dont want to venture onto a mx track, look at the KDX...they are great woods bikes, and cheeeep too!
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