2 stroke flywheel weight

[glukasil]

hi guys....what adding weight to flywheel do to a 2 stroke?
kdx 220.
thanx a lot.

[gwynfryn]

Not exactly clear what the question is but I don't see the point in adding to the flywheel of the 220 as they are torque monsters as is. Most people look at ways to get them to rev out a little more such as using the 200 carb and ffm rev pipe.

[F5 Dave]

Don't usually need to weigh down a smaller engine & KDX has reasonable size flywheel, or at least my KDX200 did. Weight helps in muddy conditions & gives you some protection against stalling. Have one on my GG300 & love it. Don't think my GG200 or KDX200 needed one.

Get on KDX forum on DRN.net

[glukasil]

i have problems to go uphill on sand as it boggs...would it help?

[gwynfryn]

No it won't .

[FJRider]

i have problems to go uphill on sand as it boggs...would it help?

Heavier flywheels help maintain rev's ... and slow the increase in engine rev's. It does not increase horsepower.

So NO ... it won't help. Probably make it worse ...

[nzspokes]

i have problems to go uphill on sand as it boggs...would it help?

I have a KDX200 and have had this problem. Untill last weekend when a mate told me to use the clutch more. So keep the motor in the powerband and feather the clutch for drive. Once I got my head around it she goes way better.

Does your bike still have the stock pipe?

[F5 Dave]

its the only problem with 200s, severe uphills & sand.

The 220 is lumbered with a silly pipe & small carb but getting the jetting right will help, 'cause they are miles off (again check DRN.net under KDX area).

After that its technique.

[scott411]

its the only problem with 200s, severe uphills & sand.

The 220 is lumbered with a silly pipe & small carb but getting the jetting right will help, 'cause they are miles off (again check DRN.net under KDX area).

After that its technique.

in NZ they weren't to badly jetted in my experience if they have not been fucked with, sometimes you have to watch overseas jetting tips as fuel can be different,

in saying that a KDX200 carb is a good upgrade if you can find one, the 200 can go a bit leaner from standard as well tho,

I have raced and ridden a lot of 200 and 220 KDX's and on the steep hills you will need to go down a gear and/or use the clutch a bit, in the end they are a small bore two stroke, and you will need to use the gear box,

[F5 Dave]

I've only ridden a 220 once & it was a bit foul compared to my sorted 200, but that is only one bike. My early 200 had stock jetting when I got it & it was woeful.

[scott411]

I've only ridden a 220 once & it was a bit foul compared to my sorted 200, but that is only one bike. My early 200 had stock jetting when I got it & it was woeful.

depends on how early is early is, , the H models were not to bad(its nearly 20 years since they were released now, and I was not around selling the early ones) but going one lower on the pilot and main made a big difference, I raced a KDX220 one year in the Expert 250cc supercrosses, and from memory (it was 1997) we leaned up the pilot, ran a pipe and muffler and the heaviest fork and shock springs we could find,

my old man still runs the last of the KDX200's with a 220 barrel, and a few other mods, (its the bike that Mr KDX Jeff Fredette rode at the 06 Taupo ISDE)

the worst bike I ever had with standard jetting was a 03 RM250, (again from memory) we got Euro models that year and I had to drop from a 185 main jet to a 172, it would not run above half throttle from standard, I have never been one to get really finicky with jetting trying to get the last little bit out of them, but that bike was so rich from standard it was incredible,

[nzspokes]

Im guessing mine has been played with as i rode a stock one on the weekend and there was a huge power difference between it and mine. I just thought mine had a pipe but guess the carb has been messed with. Gunna leave it alone. Mine also sits a good inch or 2 higer than the stock one.

[F5 Dave]

prolly the stock one has knackered linkage bearings & spat the needles out choppering it &/or shorter rider dialed out preload.

[scott411]

Im guessing mine has been played with as i rode a stock one on the weekend and there was a huge power difference between it and mine. I just thought mine had a pipe but guess the carb has been messed with. Gunna leave it alone. Mine also sits a good inch or 2 higer than the stock one.

pull yours out and see what it is, if it has a standard reed block (sometimes rad valves were added but not that comman) the 158 main jet is the go, (160 standard) and 45 Pilot Jet (48 standard) needle in the middle position, i would doubt the meedle would have been changed but the middle position is about right, air screw at around 1 1/2 screws out,

if your one is still down on power, a top end with having the power valves checked to see if they are working would be the next thing to look for, and also check to see the reeds are ok,

[nzspokes]

pull yours out and see what it is, if it has a standard reed block (sometimes rad valves were added but not that comman) the 158 main jet is the go, (160 standard) and 45 Pilot Jet (48 standard) needle in the middle position, i would doubt the meedle would have been changed but the middle position is about right, air screw at around 1 1/2 screws out,

if your one is still down on power, a top end with having the power valves checked to see if they are working would be the next thing to look for, and also check to see the reeds are ok,

LOL, I dont want more power. bloody thing is to fast as it is. the guy that rode mine that had the stock one came back a bit white faced. Im not changing a thing. It goes real well.

All I really want for it is a set of the stock stickers, back tyre and linkage kit.

[sugilite]

i have problems to go uphill on sand as it boggs...would it help?

The trick with sand is to get aggressive and get the bike running up on top of the sand, things become a lot easier at that point. Same for hills too when on a smaller two stroke, get busy with the clutch, no point trying to lug it up the hill.