need help building a woods monster 250r

[mikey's250sx]

well as it turns out i am keeping my 300r so i have decided to enlist some help in making it a better woods bike.

here's the skinny
my gripes were
abrupt power delivery
1,2 and sometimes 3rd were worthless
didn't turn for sh*t


all that led to a lot of blown corners because i was (a) going too fast all of a sudden or (b) i just couldn't turn quick enough

now i geared it down to a 12 tooth front sprocket figuring that would be great for the tight stuff but all it seemed to do was wind it out faster and have me in 3rd or 4th when i should have been in 2nd. so i got a 14 tooth and 15tooth front sprocket and i will try them out first.

what affect will going back to the stock 30mm carb have on my rideability? i have a cr250's 38mm mikuni in there now.

i also just bought new forks because on the ones i have one air valve is bent and one has a bolt in the fork cap. i have almost no rebound in the front. they pack down after some straight riding until i nail the gas. i am hoping that will be the main problem with turning somehow.

i am also looking into a nice swingarm skidplate from prm but they are about 80 bucks so i am still looking on ebay for now.

for better turn in should i raise or lower the forks in the triples?
i also scored a set of goldies for the rear to swap out for my aluminum rims. and i am working on some stickers to dress up the plain tank a bit.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=4609451996&sspagename=STRK%3AMEWA%3AIT

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4610982174&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

[mikey's250sx]

oh yeah,
can anyone think of anything else that will help out suspension set up wise for woods riding? keep in mind i am 250lbs and am always going too fast.

[ATCWRENCH]

I would have rebuilt my forks with new seals and swipers with heavier rate springs and heavier fork oil.

putting the 30mm carb back on is going to make a major power drop as its going to cut air flow down.

[86waterpumper]

putting the 30mm carb back on is going to make a major power drop as its going to cut air flow down



this isn't true, it will definately hurt the topend, but for woods riding it's the ticket, actually at low rpms, air velocity will be increased signifigantly, hence the reason the kawasaki kdx220 (woods bike) when it was redesigned from the 200, ended up with a smaller carb than the 200 had, 33 vs. 35 mm

[mikey's250sx]

i thought about re-building the forks first but i needed a lot of parts for the top of the forks and from service honda i was looking at about 40 bucks without shipping so it would have ended up costing me at least 75 total for everything i need and this way i get oem honda boots in the right black color and complete forks that do not need any new parts. i can swap out the better set of triples and bearings and sell off the parts i do not need and re-coup some of my money. i figure i will only be out around 50 bucks after i sell the extra stuff.
so this happened to be the way to go.


anyone have any jetting ideas for the 30mm carb with the 300 kit?
i may re-build it and try it to see how it goes.

what about raising or lowering the fork tubes in the triples? how will that affect turning?

[ATCWRENCH]

when honda sold the 300 kit, it came with a bigger jet for the factory carb. you might beable to call honda and either get that jet or they can tell you what size it was.

as for sliding the forks up in the trees, you can do that and it will quicken your steering but you run into a problem with your front tire hitting you pipe when the tire comes up to far when the forks are compressed.

I could tell you how to shorten your forks correctly but its time consuming and you probably dont wanna do it anyway.

[mikey's250sx]

your probably right!:)

[smokinp]

what are you running for tires?

[mikey's250sx]

20" holeshots

[Old 179]

Dirt Wheels (July 1983) A 135 jet replaced the 130 jet. The 300 kit sold for $278.95. note: the kit had a shorter carb to air box boot, four diff. oversize
pistons, torque was bumped from 21 to 24 foot pounds,, hp from 25 to 31. It said it was for the 83-84 models.Honda claimed it would not fit 81-82. DW said it would by trimming head fins for exhause pipe clearance.

[KASEY]

as for sliding the forks up in the trees, you can do that and it will quicken your steering but you run into a problem with your front tire hitting you pipe when the tire comes up to far when the forks are compressed.



no ,,, it can't possibly do this!!!! you are not changine the fork angle in relationship to the frame,,,, and bottoming the forks out doesn't let the tire hit the pipe,,,,,so explain why you feel this will now let the tire hit the pipe,,,,,,,,,,,,,,,,

[mikey's250sx]

in the old dw article did they keep the stock 30mm carb or go bigger? do you have the article? is there a way you could scan it and e-mail it to me?

thanks.

[Old 179]

in the old dw article did they keep the stock 30mm carb or go bigger? do you have the article? is there a way you could scan it and e-mail it to me?

thanks.

Yes, every thing was left stock except, jug and head, carb boot and 135 jet.
Calif. jetting may be differnt then your area.

[BigGreenMachine]

I'd swap back to the 12 tooth front sprocket as well. You need to have the snappy throttle response in the woods to get you out of trouble. The biggest difference is going to be the carb and gearing. Small carb to get the power back in the lower end of the powercurve and the shorter gearing to amplify the bottom end grunt. Best of all I think you need to adjust your riding style m8, get use to the trike and know your limits. If your over running turns then you need to back off. Smoother is always faster then all out and outta control.

[BLAZERONE22]

So have you made your changes yet?

[350x'inNY]

12 tooth up front is very tiny. Mine came with a 15 up front and I went back to the stock 13 and am happy in the woods. (82R) I would suggest some Progressive Suspension front fork springs for your R as well. (someone else already did earlier)

I picked up a 300R motor and it had a 85R carb on it. I'd like to see a scan of that Dirt Wheels article also. I know for a fact that the 300R kit will work on a 81-82R w/o shaving the head cause 200Xman did it. However, the 81/82 did have an even smaller carb than the 83/84R Personally, if I was Honda, wouldn't you want them to "have" to put it on a new model? Also, the 81/82R has such a short wheelbase and worse suspension than the 2nd generation that maybe it was a safety concern too.

[ChrisD]

My woods bike is as follows:

stock cylinder ported and bored to 100 over. I also use the following: K&N, 39 PWK, rad valve, shaved head PT Hi-Rev pipe. I run a 60 pilot and a 190 main in the summer. I use 14 / 36 gears.

I personally never gave into the you need a small carb, a stone piston, mud for oil stuff for my bike. I like a strong running motor with some gear behind it. The snappy feel will be offset by taller gears, but the motor will have the torque and horsepower behind it to pull when you want it. I'd rather have the power to pull a 4th gear wheelie over something such as a ditch, branch, etc....

The only thing I didn't do to the motor was all of the "lightening mods" such as flywheel, counterbalancer, and clutchbasket. That will dramatically reduce torque.

Good luck.

[grundlegrabber]

*Edited**Edited**Edited**Edited**Edited**Edited**E dited*! I was watching those wheels, but got busy that nite and missed the auction. Paul turner type 6 pipe is supposed to be the low-ender. I scored a new skidplate off ebay last year for $60. It was a company that makes them selling them. Damn near PRM quality for a lot less $$. I'll dig up the name. 22" rear tires for the woods- Sur-Traks maybe?? Keep the motor heavy (clutch basket, flywheel, etc) to maintain torque. Top end HP ain't no good in the woods.

[BigGreenMachine]

Also the defination of woods is pretty lose lol. Where I ride most woods trails are real tight without much room to gas it.

[BLAZERONE22]

Also the defination of woods is pretty lose lol. Where I ride most woods trails are real tight without much room to gas it.

Lol I know my 350x is lucky to see 3rd gear in my definition of woods riding, so much as doing 4th gear wheelies over logs.