TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: mwiley on October 26, 2017, 10:57:14 PM
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So, my bike has been sitting in pieces for the last 2 years because of life. I took the motor apart because it needed the top end freshened up and I wanted to fix the cases, cyro the tranny, etc. Just never got it done. So, 2 weeks ago I bought my 16 year old son his first 250r and now I need to quit screwing around and finish my bike so we can ride. My question for everyone is based on experience what kind of motor build w/pipe would you guys recommend for a do it all bike. We will be trail riding, visiting Silver Lake sand dunes, and if he wants we might hit up a mx track or look for some XC stuff. I have decided against using my old ported stock cylinder because it looks like it was a learning tool for someone and I need to buy a pipe anyways, so in my mind I might as well get a bb pipe!!! I already have a 38mm carb, boyseen rad valve and a 01 CR ignition. I have actually thought about seeing if Eddie Sanders is going to offer the same deal he had last year with a set of cases and one of his 363 cylinders in a motor builders package but wondered if that would be too much for the woods? I have also thought about seeing if I could swing for a CPI sphinx cylinder in the 330cc range. I know this would probably be the most expensive route. Let me know what you guys think.
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Call led. Go with his recommendation. If it’s too expensive, go with esr. I personally like 330-350cc range. I’ve ridden tight dune trails in Oregon, but no experience with tight woods back east.
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That kick but ESR kit is available right now. Just ask for it to be set up for woods use but remember a woods set up and a dunner set up are very different. You need to give on one to help the other. Today I don't think a sphinx will be recommended over an esr for woods use unless the seller makes more profit on the sale of a cpi over an esr. For woods the added trx7 port, trx7b pipe, race gas dome if possible and maybe consider a flywheel weight for the cr ignition. More versatile for dune use too you may go trx5b.
http://www.eddie-sanders-racing.com/product_p/363-kit1.htm
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Sphinx are excellent cylinders. But the esr prices are outstanding, and pretty good quality and reliability, so I'd personally pick esr.
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I have a sphynx 363 which I love but is it really worth the extra $600 for an additional 6hp hard to say