Author Topic: Woods riding (Read 11320 times)

broken1 · « **Reply #15 on:** August 19, 2016, 06:41:03 PM »

Quote from: Felten;69291

Hi Joe, The technical riding you described is the type of riding I like to do. Normally I ride this sort of terrain on my TRX450R, but at this point really want to focus on 2-Strokes and will probably sell the TRX450R if I can get the 89 TRX250R setup to work just as good or better than the 450R. BTW, I figured the Eliminator pipe was a better option for the Oregon dunes than in the woods. I assume the 39mm Carb will also need to be changed.

A flat slide card would give you a little better low/mid power & throttle response. 12/39 gearing also works well in the woods with a stock cylinder. Have you opened up the top end to see if it's been ported?

jto1 · « **Reply #16 on:** August 19, 2016, 07:47:40 PM »

Great low mid pipe is esr trx6 if you can find one. Small bore would be fine woods riding, but I would focus on a low mid port job. Even an mx port, where its good down low, with a strong mid range.

Felten · « **Reply #17 on:** September 01, 2016, 10:24:52 AM »

Quote from: broken1;69292

A flat slide card would give you a little better low/mid power & throttle response. 12/39 gearing also works well in the woods with a stock cylinder. Have you opened up the top end to see if it's been ported?

Thanks for the advice. Honestly I have never done any engine work and wouldn't know what a ported top end looks like. My 89 TRX250R has a Pro Design Cool Head, but I don't know what model dome it has.

Skeans1 · « **Reply #18 on:** September 01, 2016, 12:33:42 PM »

Quote from: Felten;69369

Thanks for the advice. Honestly I have never done any engine work and wouldn't know what a ported top end looks like. My 89 TRX250R has a Pro Design Cool Head, but I don't know what model dome it has.

To find out you just pop the dome out of the shell but you may need a head gasket depending on how it's setup.

Felten · « **Reply #19 on:** September 01, 2016, 04:30:00 PM »

Quote from: Skeans1;69370

To find out you just pop the dome out of the shell but you may need a head gasket depending on how it's setup.

Thanks... That makes sense. I was on the Pro Design web site and it looks like they have quite a few domes in different millimeters. I really have no idea what the different sizes do for power, etc. Taking a stab in the dark I would guess the lesser the millimeter the more power produced?

broken1 · « **Reply #20 on:** September 02, 2016, 11:27:40 AM »

Quote from: Felten;69371

Thanks... That makes sense. I was on the Pro Design web site and it looks like they have quite a few domes in different millimeters. I really have no idea what the different sizes do for power, etc. Taking a stab in the dark I would guess the lesser the millimeter the more power produced?

Lower dome cc= more compression, higher cc= less... If you pull the carb & reed cage off anytime soon, take a good picture of the intake opening & post it & we could tell you if it's been worked on or if it's a virgin.

Felten · « **Reply #21 on:** September 03, 2016, 04:39:30 PM »

Quote from: broken1;69374

Lower dome cc= more compression, higher cc= less... If you pull the carb & reed cage off anytime soon, take a good picture of the intake opening & post it & we could tell you if it's been worked on or if it's a virgin.

Thanks Broken1! I appreciate that and will try to take a pic sometime soon. It's unfortunate, but I don't know much about this 89 at all. The guy I bought it from purchased it from the original owner and he pretty much bought it for resale. The only thing he could say was that the bike was all stock, even though it has aftermarket silencer, pipe, head, reed cage, carb and air filter.