TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: JoePA on September 23, 2013, 12:43:39 PM
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I would like your input on an engine combo. I'm thinking about next year race season and would like to go one of two ways. First combo is a stock cylinder ported by neil with a cool head...18 or 19 cc dome. Or pick up an ESR 310 cylinder with their port work. Money is tight as it always is or I would just go 330. I'm leaning torards the stock cylinder setup unless more funds come along. I'm basically looking for the best bang for my buck. I'll even throw this out there as another option....is the 330 worth it to just save up and go that route? lets put a budget of $1000...what would you build?
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I would say more importantly,is your suspension good to go for next year? Adequate setup,serviced,maintenance done on it? That can eat up a budget real fast but if thats all good I would think the Neil ported or the 310 would be choices,maybe even squeeze a Neil ported Esr if budget allows.
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What class or racing are you trying to compete in? Also is it Local Racing or National?
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Suspension is good...just needs service and that's already in the budget. I race a local series in the Vet A class. I can hang and beat the top rider but I really got to work at it as he runs a 520 BB in his Honda.
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Id go bigger... 330 or more.
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1000.00 will get you a 330 non power valve with a 4 mill crank. You can't beat that without spending a LOT more.
edit= This is the link to what I was talking about.
http://www.eddie-sanders-racing.com/product_p/330-76mm-stroker-kit.htm
950 as cast, +100 for thier port to it is 1050. That is set up for the 4 mil stroker crank and you get the Free case mods if you send them the cases.
Good luck with whatever you do.
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1000.00 will get you a 330 non power valve with a 4 mill crank. You can't beat that without spending a LOT more.
edit= This is the link to what I was talking about.
http://www.eddie-sanders-racing.com/product_p/330-76mm-stroker-kit.htm
950 as cast, +100 for thier port to it is 1050. That is set up for the 4 mil stroker crank and you get the Free case mods if you send them the cases.
Good luck with whatever you do.
Thats a good deal!!!!
How does a 4mm stroker work with a stock cylinder?
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Sleeper!!!!
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Thats a good deal!!!!
How does a 4mm stroker work with a stock cylinder?
Not the same as the 330 with a stroker but a nice step if you want to keep oem cyl.
Remember to include all required costs having the ports set up for the crank, piston kit, etc etc as you compare the costs of your options.
Good luck.
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Looks like I have a new engine combo in mind!! Thanks guys I'm liking that setup.
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I think an OEM cylinder w/ 4mm stroker would be an awesome setup to try out. When/if i get another 250r I think i'll go that route
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That sleeper sounds good but so does what I want to build. A 370pv 4mil stroker with a spynx cylinder by LED.
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Looks like I have a new engine combo in mind!! Thanks guys I'm liking that setup.
Joe, that 330 stroker would definitely be a good upgrade. And you should even have room to grow after that. A while later, you could get that cylinder ported by someone like Neil or Arlen to really draw the most power out of that cylinder. My ESR 310pv has the TRX 7 porting already, but I really feel like more could be pulled from this cylinder than I have now. I know I have heard a few stories from guys who had their ESR cylinders reported by Neil or someone else and said the cylinders really came alive.
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My CT310 was not ported at all from ct and I had my local engine guy port it for mx and wow it is awesome to ride, and now with the full esr head and all race gas dome its even better too. Hard to start rite now but I think its gonna be an animal on the track.
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you guys are killing me with all this engine talk!! The hard part is the wait till next year!!
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I would go 69 mm bore stock jug 4 mil stroke set up with mx port. you would be suprised how this would run and you have the cylinder already.
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you guys are killing me with all this engine talk!! The hard part is the wait till next year!!
Joe. The season's not over yet! Get out there and race what ya got!
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I heard/read that the 4mm stroker with a stock cylinder is a very good setup. With that being said is the 330 with a 4mm stroker that much better?
Ryan,
That's my plan. Going to try to fix my cool head to bump up compression for the next few races. Got to let the R out as she's been sitting for way to long!
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I heard/read that the 4mm stroker with a stock cylinder is a very good setup. With that being said is the 330 with a 4mm stroker that much better?
This is a rhetorical question right? lol. There is no replacement for displacement. the stroker setup in general will add additional bottom end. However, the bigger bore cylinder will also add bottom end on top of that. It really just depends on how far down the rabbit hole you want to go. I will tell you this though Joe, a guy told me before I bought my 310 kit that once I tried it, it wouldn't be long before I would want a 330. He was right. I really like my 310 kit, but when you are battling 4-stroke engines that are much larger and easier to ride, you need every advantage you can get. In my opinion, especially in racing, it is better to have more power and not need it than it is to need more power and not have it. Just food for thought.
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Have any of you guys tried PC2000 kits for MX?