Back wheel keeps locking and skidding on pit bike wen shifting down gears. wht am i doing rong?

bike: stomp 110fx pit bike

actually its a manuel clutch and its not a honda copy!! (not it alls!)

I think everyone nailed it, but I'll add a little. Along with using the brakes to bring down your speed before shifting, don't drop the clutch on a downshift. Instead, use it just like you would on a launch, ease it out and feel the motor/traction relationship changing. Also note that your 4-stoke produces alot more "engine braking" then a 2-stroke. This is the compression literally working against the piston and the rest of the drivetrain when off throttle. Technically, this is whats causing your back wheel to lose traction. By reducing your speed before shifting, and using your clutch to minimize the engine braking effect getting to your rear wheel, you will completely eliminate this problem. Have fun!

You are not letting the bike slow down enough. I know, I have a 1972 Honda CT-90 which is the bike and engine your pit bike was copied from.

You have to let it go down to idle before downshifting, then you will be ok. Don't worry, you will be in a good gear to pick right up again even when you shift like I described.

Even with a manual clutch, you are downshifting too early, and letting out the clutch too fast, and your cylinder and head will fit right on my CT-90, not that I need it, but if I did, I would use that cylinder and head, it's made decent.

Edit: Just googled the stomp, and it is a total Honda copy engine, enjoy your finely made copy.

its because when you shift down in gears your rpms are too high and its an automatic clutch so that causes it to lock and skid till your going slow enough to be in that gear. Like when your going in good in third and put it in second. Thats not the best for your bike either so slow down before u shift down and it wont do that.

you are going down the gearbox to quickly do it from 5th to 4th a nd so onand slow down that way will stop the wheel locking just dont do it quickly seen a lot of damage to gear bo9xes and thats the primary cause

you have to balance revs and engine speed to stop the rear locking up, when shifting up reduce revs and when shifting down increase revs, its all about balance, it'll come to you