Hi
I just bought a 1995 blaster that is bored to 250cc and has wiesco piston and gaskets and seals. It also has an aftermarket pipe not sure which brand and it is supposidly jetted correctly. I got it to run after a long time of kicking and I sat there revving it till it stopped smoking so much. Then I started to drive it and it has lurches of power. I thought it was just 1st gear so I put it in second and it was doing the same thing. It was sitting for about 9 months not being driven because of a broken clutch cable (replaced now). Also the gas was left on during that time. Is my problem just the carb needs to be cleaned or something else?
I appreciate any help I recieve.

 

if it sat for 9 months drain the old gas and clean the carb you might also want to change the plug

 

Ya I drained the gas and the plug seems ok. It was running fine for about ten minutes then It ran out of gas so I put more in and I was going to drive it home but then it started doing the lurching thing. My friend is pretty good with engines so he said he would clean the carb for me.

 

are you mixing the gas or do you still have oil injection

 

I am still using oil injection which still works great

 

then just clean the carb and you should be good you may also want to do a compresion test to make sure you dont have any leeks you shouldnt be lower than 129psi if you are you may need gaskets or rings maybe even a whole new top end

 

I have 130psi and it had a top end rebuild when it was bored. and that wasn't long before it sat for a while.

 

then you just need to clean out the carb it shouldnt be hard you should also check the jetting stock main jet is a 230 so you should be around a 260-280 or maybe higher not sure because i dont know what pipe you have

 

It is aftermarket but I don't know which kind becuase the label is worn off. Can I just use the spray type of carb cleaner and spray it in through where the air filter goes and where the gas line goes or do I have to take it apart.

 

take off you air filter and spray some carb cleaner throguh there also take off the bowl on the bottom of the carb and make sure there isnt any junk built up in there