Bad Voltage Regulator

[spldart]

Our service manual of blessed knowledge page 104 and 105 didn't help?

[spldart]

iirc the jet with the biggest hole centers over the same opening that the needle slides down It's your main. That's where your horsepower comes from.
You'll have to pardon me as I am
Please feel frree to correct anyone.

[Lifter]

Hello Folks!!!

Ok so i have cleaned out the carb and put it back together. The bike starts well and i took it for a spin. This lasted about 5 minutes and then same symptoms of bike studdering and stalling.

I got the new Regulator in and installed it. After starting bike up i couldn't even get it warmed up and out of parking lot until these same symptoms started to pop up.

I parked the bike and am going to adjust valves tonight.

DO you think that this can even be the issue at this point?!

Thank you all SO much for the assistance on this and advise: Im sure getting a lot of Bike Mechanics experience.

Ill start a new thread after i adjust valves if the problem still isn't fixed.

[wacio]

Things to check:


- disconnect from the carb hose going from tank to and put some container under it. Get petcock on prime for 15 - 20 seconds. You should get good consistent fuel flow. Try if bike runs OK when on prime.
- make sure that cable going to spark plug from coil doesn't rest on cylinder head. Mine was melted almost to conductor. It might be shorting ignition when bike is hot. Zip tie to frame so it is spaced from head.

[spldart]

started and ran well for 5 minutes after cleaning carb and checking a plug that was decent.
Is the fuel in the tank old?
Is there rust in the tank?
You might have to pull the petcock to check the fuel screens. One may have dislodged.
If crap in tank or dirty fuel you may need to drain tank, carb bowl to get the crud out.
Wish I was there. Meh.
And lastly.
You may need a timing light. Not to time but to check that it's firing regular when it's acting up.
You should see rythmic strobes from the light that you can see increase/decrease with revs.
I have seen a CDI modules and ignition coils go thermal intermittent.

Still. I'm guessing from miles away

[spldart]

Remember. It's air, fuel, spark, compression and timing.
I doubt your timing shifted or you cam chain skipped in the 5 minute test.
I doubt your compression was lost in a 5 minute test unless you ran with no oil.
So something is interfering with air (air filter) fuel (bad or clogged) and spark (electrical)

[Lifter]

Originally Posted by wacio

Things to check:


- disconnect from the carb hose going from tank to and put some container under it. Get petcock on prime for 15 - 20 seconds. You should get good consistent fuel flow. Try if bike runs OK when on prime.
- make sure that cable going to spark plug from coil doesn't rest on cylinder head. Mine was melted almost to conductor. It might be shorting ignition when bike is hot. Zip tie to frame so it is spaced from head.

These things checked out. Thanks!

[Lifter]

Today i finished adjusting the valves, put the tank back on and took it for a test ride on Prime. It ran for 3 KM then began studdering or stumbling again. After doing this 2 or 3 times i got a backfire and eventual stall.

After walking it back home, i drained a bunch of gas and pulled petcock. screens looked clean. As far as i can see in the tank, i don't see any rust at all. Just a nice consistent light grey paint.

I cleaned out air filter and checked for obstructions.

I feel like at this point i may be reaching the limit of my abilities on this repair... Maybe its time to give up and bring it into a shop? But i sure am getting a lot of practice!

Any other intermediate level troubleshooting on this?

Thanks as always!

[spldart]

O_o Wowzers. At this point I'd be thinking electrical but that is getting a bit more involved.
This problem has sure put you through the ringer

[blaine]

Have you tested electrical output since you put on new regulator on.........This way you can rule out stator.....I have a feeling it is the culprit.