Pulling without twisting throttle

[JRMN]

I bought a used Baja Doodle Bug DB30 yesterday. The pull starter is missing, but I am able to get it to start using just the rope. Anyway this is the first mini bike I've ever own. I have a quick question, is the mini bike supposed to pull without the twisting throttle because mines does? Any ideas why this might be happening?

 

[jeffs022]

Most likely the clutch is grabbing. Sometimes the idle is too high and the clutch engages, but most of the time this ends up being a bad or dirty clutch.

 

[JRMN]

thanks. That makes sense because the clutch cover is missing.

 

[jdogg]

Oil the clutch bushing and the clutch bushing only with a few drops of 30wt oil while the clutch is hot or warm.

 

[Camjamsdad]

Oil the clutch bushing and the clutch bushing only with a few drops of 30wt oil while the clutch is hot or warm.

That's my guess. I'd take the clutch apart, clean everything, then apply lube to the bushing.

 

[JRMN]

Ok guys I did some more investigating today and the bike isn't just pulling it's moving as if I am twisting the throttle. In fact I have to hold the brakes so the bike doesn't get away from me. The engine also turns off when I turn the choke lever to the off and between on and off positions.

How hard or easy is it to take the clutch off? I not much of a mechanic.

 

[bandit 40]

Is your chain really tight? it may need loosened up, just a thought:shrug:

 

[old-timer]

Theirs a real good thread on here if you search for it, covering clutch maintenance with step by step pics and instructions that should be a big help for you :thumbsup:

As far as the choke goes, the carb needs to be cleaned . It's starving for gas. The 97cc DB motors are famous for this if they have sat a while with gas in them.

 

[JRMN]

@bandit 40, the chain looks really tight when the engine isn't running, but looks loose once I start the bike. Oh and the chain tensioner was/is missing on this bike.

@old-timer, thanks looking for that thread now. Oh and you might be right, I do believe the bike has been sitting for awhile.

 

[old-timer]

This thread may help you :thumbsup: The clutch is different but the principle is the same. Hope this helps some.

Vic


http://www.oldminibikes.com/forum/tech-section/62997-max-torque-clutch-installation-oiling.html

 

[Patch1st]

Vic, I don't have permission to access the page you linked too....
What does that mean??

Patch

 

[old-timer]

Vic, I don't have permission to access the page you linked too....
What does that mean??

Patch

Not sure, it might be a supporting members page only :shrug: I'll have to take another look.

Vic

 

[old-timer]

Yea it was in the supporting members forum. Sorry, I should have picked up on that before posting the link. My bad :doah:

Vic

 

[JRMN]

Thanks old-timer.

I've been watching a lot of YouTube videos and I noticed something weird. Not sure what part this is, but I someone from YouTube said its the governor. Anyway, is it supposed to rest in this position?

Also, I am missing the hose from the air filter to the carburetor.

 

[old-timer]

Yea that looks to be the right position for the governor to me. As far as the hose, you should be able to get a piece at any local auto parts or hardware store.

 

[JRMN]

Are you sure its in the right position? When I press down on the throttle lever, isn't it supposed to move to the right away from the screw?

 

[old-timer]

Yes I believe it should move away from the stop screw as the throttle is opened. Now you've got me wondering lol. Maybe someone a little more knowledge on these will chime in to help

 

[Camjamsdad]

Is the engine running when you're trying to move the governor by moving the throttle?

 

[Newoldstock]

The governor spring will open the throttle completely when the engine is at rest.

You need the centrifugal force of the governor weights at operating rpm to force the throttle closed.

провал смертельної

 

[old-timer]

Then yes that would appear to be the right position in the pics you have.