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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Eric Gorr YZ144 -- 2 Strokes ain't dead!
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[QUOTE="lwsmithjr, post: 1126484, member: 35074"] For all of you that think the 2 stroke can't be competitive in modern MX.......... My 19 year old son has been racing for the past 6 years. he started out on 80's, moved to a 125, then like everyone else, a 250F. At 15, the awful parent that I am, turned all of his racing expenses over to him. He paid for bikes, maintenance, practice and race fees. I got him to the track and back, but he handled the rest. (I did provide the lawn mowers for his grass cutting business just so you won't think too bad of me). He bought the 250F in August of '03 right before the '04's were released. He bought a Yamaha and for the most part, it held up to it's reputation as being reliable. He broke 4th gear twice in the 2 1/2 years he owned it, replaced the valves w/ Kibblewhite stainless, plus three top ends --$2400 to $2600 in engine maintenance. January of this year, he decided it was time to return to the 2 stroke. Weary of $1k a year maintenance and trouble getting it re-lit in the heat of battle, he bought an '05 YZ125. Stock, it's a great 125. But in the world of 4 strokes, a less capable rider can turn faster laps. One slight lapse of concentration and the guy behind you is now in front. He was just about ready to go buy a 450 (forget skill, gimme horsepower!) I convinced him to look at the 144 big bore. For what it would cost by the time he sold the 125 and bought the 4 stroke, he would be out $1500. The big bore was $500. $1000 will buy a lot of stuff. I pulled the motor and sent it to Eric. Ten days later, I had it back. UPS got a little rambunctious in shipping, so we had to order a couple of parts. I finally got the motor put back in this past weekend. I rode it around the yard and thought the power was noticeably better right off of idle. But the back yard and track are in no way alike. Friday after Thanksgiving we went to the track and - Wow! What a difference! The acceleration out of turns is unbelievable. My son was able to clear a 70' triple out of a turn from the inside with no problem. He tried a few second gear starts and had to work to keep the front wheel on the ground. And I haven't even touched the jetting yet. It's a little fat in the middle, so I'm going to drop the needle. It can only get better! We're also going to go back to stock gearing (currently one up on the rear) so he can hold third a little longer. We lost some over-rev, but that was expected. The next gear will pull with no problem anyway. This thing pulled my 190lbs. around like a 250F. You don't fan the clutch, just flick it. I can't ride 125's worth a flip, but I could ride this one! It was much more than I ever imagined it would be. We went with mid to top porting, but this thing still pulls from the basement. No more excuses!!! Excellent Work! If you have a 125, this is the best $500.00 you could ever spend. Thank You Eric! [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Eric Gorr YZ144 -- 2 Strokes ain't dead!
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