ok so my poor hawk ever since I bought it, has had every problem thats common with them. including the 2nd gear popping into nuetral. so now my new issue is this first it sounds like a chain rattle no matter what i do then no matter what gear or how fast once i let off the throttle the bike feels off similiar to if i were to pump the brakes hard but the engine keeps a steady idol and no other issues whats wrong with my baby......

background on the bike
2000
996
Yoshimira Rs3 no baffles
carbs jetted
front sprocket -2 teeth
dunlop qualifier tires

 

Sorry about the bad luck. Hopefully you wont need a gearbox but if you do I have a good one I will sell you. PM me if you need it.

 

You have a 14 tooth sprocket up front?

 

Is that bad, but yes I do

 

the more and more i read i think its that cct problem anyideas?

 

where are you located?

maybe someone locally could help you or at least take a look.

 

I live on the south side of chicago but my father is a mechanic he looked at it and I mentioned the cct and he said that would for sure make it do what its doing and also not to drive it cause it can snap that chain and do a hell of alot more damage than its already done.....now anyone know of a good mechanic in chicago thats resonably prices

 

Haul it there on a trailer.

That sure sounds like a dead CCT, if so you have holy nuts that your engine did not lock up and chewed the valves.
There may be other causes, but this is the most common.
Good luck with this

 

If your dad is a mechanic, he should be able to go a long way troubleshooting it.
Don't run the engine.

First off, you need a service manual.

Pull the spark plugs out, the plugs in the left cover and remove the valve covers (other disassembly required).

Without removing the CCTs, rotate the engine by hand with a 17 mm socket. The timing marks will be visible in the forward hole in the side cover. The rear fires 270 degrees after the forward. The cam timing marks should align with the top surface on the head.

If tha cams haven't jumped out of time, you can probably replace the tensioners and be fine. If they have, check compression.

If it's the gearbox, there's probably shrapnel in the oilpan.

 

Thinking about this some more...

If you have a cam chain problem that was giving that much engine braking, I'd be worried about the condition of the chains themselves. They aren't big enough to withstand that much tension.

How does the front sprocket look. Could the drive chain be hooking on worn teeth? 14 is really small. Wheelie much?

 

I (we) forgot to ask the most obvious question:

Did you put the new front sprocket on with an old chain? If you did, the chain is probably stretched (as the chain wears, the pitch gets longer).

Take the sprocket cover off and raise the rear tire off the ground and check to see if the chain rolls off the sprocket smoothly.

It's called chain suck on a bicycle. It will make the bike lurch just like you describe.