Seek advice re: TGB r50x scooter -- dies while I'm riding! By tominbmore (Read 8,889 times)

[tominbmore]

I got it no worries. Just pulled hard.

[jwhood32]

Yeah if u keep having issues with the petcock u can convert too a manual fuel on off and cap the vaccum line hole off on the carb,also you should look into getting a 17.5 mm carb that will give u a little more fuel delivery and there is a restriction ring on the variator that cause the variator not to close all the way causing you too top out at like 35mph!!!Also the Speedo is way off your actually not going as fast as Speedo says it's of between 8-12 mph GPS your speed will give better idea on how fast your going

[tominbmore]

Tx man!

As for the restricter, that was removed.

I hit 50 on downhill the night I bought this. And it sure felt like 50.

Hey can you, rich or allwyoop tell me which screw in this close pic is the idle screw and which is air ratio screw?
Alleyoop you sent that grest tutorial about adjusting carb to go more lean or rich. I'd like to test that out.

Note that in this pic the fuel and vac hoses are pulled off the carb...

[Bashan]

That filter looks OK to me, I think that's the washable kind, I'd wash it out with soap and water. Sometimes you have to cut hoses off of the nipples. Use an exacto and make a cut parallel to the nipple then peel it off.

[tominbmore]

Bashan

Rich, I drained the gas, thanks for the help!  The tank now has almost half a gallon of 93-grade unleaded.  Oil is the same oil the seller gave me when i bought it, which he says is best for this scooter.  And again, weirdly, the oil didnt cause problems on the 70+ mile ride from Frederick, MD to Baltimore, MD.  

Anyway, I'll give her a spin , now that everything is bolted back on.  If it continues, I will move to the enriching idea alleyoop mentioned.

Quick question: what is a good rpm amount for idling and at full speed?  I ask because sometimes when i have taken her out for a spin, the rpm at idling will fluctuate (this is shortly before she conks out of course).  It will rest at maybe 2000 rpm, then before I even accelerate it might suddenly rev up to 4000 or so, then go back down again, all while at a red light.  Normal?  Should I do an rpm/idle test for you guys? maybe that uis related to the lean issue alleyoop raised?

tx again!!

EDIT: Revved up and riding around the block the engine went to about 7000 rpm.

Stopped at a stop light, idling, she stayed at 4500 - 5000 rpm almost always.

Not sure if that is normal.  Rode her around the block for 10 minutes, driving neighbors crazy probably.  No breaking down, bujt was trying hard to listen for changes in engine sound. No evidence... 

Got better acceleration, but on one small hill it def struggled to get higher than 20 mph.  Not a good sign at all.

[Alleyoop]

If the idle bounces it is LEAN it needs more fuel: First plug up that VACUUM PORT on the carb and see if that fixes the bouncing of the idle. If not then richen up the mixture a little ONLY 1/4 turns and try it.

[tominbmore]

Alleyoop

Hey alleyoop,

Yeah I put those hoses back on.  I was in the middle of draining gas and just wanted to see which was the air ratio screw.  can you tell from that pic?

The idle stays at 5000 rpm, and ocassionally wants to jump up to higher...

[Alleyoop]

WOW!! 5000, is there any other screws on the side of that carb to lower the IDLE? Take a shot of the side of the carb there is usually a screw that lowers or raise the SLIDE.

[Alleyoop]

Be leaving for chow with friends at 3:30 central time will be back around 5ish and well check back then.
Alleyoop

[tominbmore]

Here are two pics.






Also, in the pic I showed you earlier, can you tell me which is the air/gas screw?

[Alleyoop]

I did point out the Air/Gas Screw take a look at my picture that I labeled.
Also that GOLD SCREW on the side is that the only screw that MAY BE THE IDLE SPEED SCREW. Mark it where it is at then turn it Counter CLockwise with the motor running and see if the idle goes down.
If that is the IDLE SPEED screw the idle will drop right away.
Alleyoop

[tominbmore]

Oh , now I see what you pointed out.  But in fact what you thought was the air/gas screw was the exposed hole where the vacuum hose had been.  I sucked on the vac to get the old gas to drain out...  The thing you thought was where the vac hose belonged was in fact where the fuel + fuel filter had been.

[tominbmore]

I just rode it diwn to the gas station to fill it up with some more 93 grade gas. Half a mile there and half a mile back.

Drove better than last week. Didn't die on me (good sign).

Also, the idle was lower than that. When I stopped, in the first 20 secs or so it was just below 5000 tom idled. But tjis time I stayed stopped. After tgat 20 to 30 secs it dropped down to a 2000 rpm idle.

You should also know that at full throttle it went to over 7000 rpm... leaning to 8000. Significance of that?


Still has some acceleration issues tho. Can feel lack of trust at times at full throttle.

Only thing I need now is to find out exactly which of the many screws on my carb is the air ratio screw (see pics above).

You guys are AWESOME help. I didn't solve the problem this weekend but I know more about my engine and the parts and what they look like on my scoot. Hopefully this is just a matter of too much air intake.

Tom

[Alleyoop]

You are NOT looking at my labled picture right. The open connector "I THOUGHT" was the VACUUM port you say is the FUEL INLET to the carb OK, A lot of carbs have the vacuum port there. THE GAS MIXTURE SCREW is Labled in the picture and is DOWN a little from the fuel inlet port and has a spring under it.
Alleyoop

[Alleyoop]

You are NOT looking at my labled picture right. The open connector "I THOUGHT" was the VACUUM port you say is the FUEL INLET to the carb OK, A lot of carbs have the vacuum port there. THE GAS MIXTURE SCREW is Labled in the picture and is DOWN a little from the fuel inlet port and has a spring under it.
Alleyoop

2 STROKE REV HIGH, that is where they make their power with high rpms. 4 Strokes make power much lower RPMS.
So 7000 rpms is really nothing for a 2 stroke, you will probably find you will sometimes be running well into the 8000 range rpms.