I had a 2003 CRF230 back in 08-09 and I did some modification back then with the help of this forum and advice from Coeshow. I sold that bike in 2009 and have not been around the forum since.
We'll I just picked up a 2008 CRF230 that is stock except a PC 496 full exhaust system and I have begun setting it up to my liking, trying to learn from what I did on the last bike.
For comparison my last bike was as follows...
1986 CR125 Forks with racetech springs and fresh fluid. Kept the stock valving.
Works Steel Gasser Shock.
Impression = The forks worked well enough for me and the shock was amazing. I ride trails at a medium pace and I play around with my kids which means occasional 4 to 5 foot jumps or a slow trip around the MX track. I had raised the bike up about 1.5" with this setup. I used washers to space the steering stem and everything else was a simple bolt on.
Weisco 11.1 STD Bore Piston
Web 282 Cam
XR250 30mm Carb
Impression = The piston and cam gave the bike a gentle increase at mid and let it hold the power to the rev limiter. It did not make any increasing top end power but it stopped it from tapering off like the stock cam does. It made the bike a lot more fun to ride and overall I was pretty happy. The XR250 carb worked great but I cannot claim any major increase.
14 and 49
Renthal CR High bend
Okay so, now on to the new project bike.
What I learned from the 03 bike was that the old CR forks only really added ride height it is still an old style fork and it was just as heavy if not more so than the stockers.
So this time around I kept the stock forks and I modified the damping rods by closing off the rebound holes, used 10 wt Bel-Ray fuild filled 5.5" from the top with out springs and put in a set of Cannon Racecraft .44 kg springs. I weigh 160lbs without gear. I tested the bike with this as the only mod completed so far and I can say from memroy this setup works as good if not better than the CR125 forks for the trail riding and playing around I do.
I have decided on a set of Renthal RC not CR High bars for this bike as they are a little taller than the CR High. I have them installed and have done a short ride with them. I am still trying to get used to the bend. It angles up more at the grip area and just feels different. But I like the overal height better.
I have purchased 14t and 49t gearing as I was very happy with the gearing on the last bike. It spread the gears ratios out a bit and made the power last a bit longer. I know everyone has different opinions on this but I like it.
I have decided on the same shock setup as I really loved the last one. So a Works Steel shock is going on. I will order one directly from works and have it setup for my weight and valved for what they are calling cross country. They told me this is a middle of the road valving and basically said trail riding would be softer and MX would be stiffer valving.
For the engine mods I will put in the pre-requisit weisco 11.1 piston and I am going to try a web cam 89a grind this time around as it seams everyone that has one loves it. I have seen mixed reviews on the 282 as even I have said it is good but not much for a top hit. 89a owners have been know to say more power everywhere! I will share my impression when this mod takes place.
For the carb I am going to stick with the stock carb for awhile, when I run out of things to do on the bike I will probably go with an XR250 carb as I like to tinker and modify but I don't believe it really makes a very big difference. Either way I stick with the stock 03-05 CRF230 needle as it has been great as coeshow has pointed out years ago.
My goal is a clean looking very reliable bike that I can chase the kids on all day long and still push through the single track trails with my friends. Modifying the bike is part of the fun for me!
Edited by arl_racing, October 03, 2012 - 08:29 AM.