Cheetah tuning issues

[B.b.p builders]

It's a 535 cheetah, lectrons running methanol. First start up, it was ritch, so I adjusted the needles and now have a great idle and a very nice throttle response when sitting and blurping the gas.

Timeing plate is at plus 4, with a dynatek cdi on curve 3.

Problem is bike has great response from low idle when riding at say 1/4 throttle, as soon as you hit hi reves or anything above 1/4 throttle it has nothing!

I tried adjusting the power jets and less fuel makes it worse, jets are turned wide open.

I tried stock cdi with no change symptoms.

Stator maybe? Not producing enough spark?

Carbs are Packard carbs, 40mm put together for a 535 on alcohol. With Packard bowls.

Any help from those with similar set up, or knowledge in this would be much obliged.

I have another stator on the way, but will be a cpl days, not sure why, but that's what I'm leaning towards.

Also the motor has the power valves in it. Could it be? The problem does feel the same as when my cr250 power valve wasn't set properly. But these valves are not controlled with a cable like those.

I did clean the pv good befor installation.

[hercalmighty]

When the pvs are open all the way do they clear the entire exhaust port? I know on my 472 cheetah the pvs would still be in the exhaust port some and it would act like what you descibe. I had to cut them to match the exhaust port when they were open

[B.b.p builders]

Yes they clear nicely, I get no power at all when motor is under load it seems

[B.b.p builders]

Yes they clear nicely, I get no power at all when motor is under load it seems. I do have a set of block off plates I could try.

[B.b.p builders]

Also is tuning a lectron as easy as once your needle is set where you have a good idle and good throttle response, it should be good to go, ready for power jet tuning.

I should mention this is my first lectron

[CottonBranchRacing]

Where did the motor come from..?

 

 

CottonBranchRacing

[hercalmighty]

For giggles throw the block off in and see if it changes. So if you stick your fingers in the exhaust port and push up on the power valve it's even with the roof of the exhaust port?

[B.b.p builders]

I bought the motor from a Bhq member. Said to be k&t ported.

It came with the block off plates in it. I bought the pv to try them out.

Cheetah head with domes cut by Titan for alcohol.

[B.b.p builders]

For giggles throw the block off in and see if it changes. So if you stick your fingers in the exhaust port and push up on the power valve it's even with the roof of the exhaust port?

[B.b.p builders]

I always meds up when trying to reply to specific quote.

Yes they are good, I had to cut them to make them perfect before I put the motor together. Another member here "camatv" warned me about that when we were talking about pv and adding them to this motor.

[B.b.p builders]

It's really as bad as almost as soon 1/4 throttle hits. Tons of torque rite away.

Needle in carbs says E1

Pipes are shearer big bore

I haven't tried the block off plates yet buy will today I guess. But I just can't see The pv causing this bad of an issue?

[10milmike]

Put your dyna pack on the stock cruve. Even on the stock cruve it will advance your timing 2deg. Giving you 6 degree total.

[10milmike]

And if it was ported for the block off plates it will give you an issue. My 535 hates pv. It falls on its face if I put them in.

[RadarRacing]

You did not mention how your plugs look. Do they look like new? Are they burned at all or lean looking? Try gapping your plugs tighter. That will tell you if you have a weak spark possibly. If it has a ricky stator with half red windings, ditch it asap. I would also use a stock cdi. Those needles more than likely read "PE-1"

[B.b.p builders]

I don't see a p on the needle, (maybe worn off?) all I see is E1 the is in caps. The stator is not half rapped in red, I do have another one invthe mail.

The plugs first few threads are like brand new. However the strap is dark colored