Counter balancer part number

[Kbowen4]

Can anyone on here dig up a parts diagram for a 98 gasgas ec250 for me, i need the balance shaft and gear. I currently have a 05 ec300 motor in a yz250f chassis that vibrates like wild. I would love to find a balance shaft that i could throw in a buddies bottom end that i can buy for next to nothing. His has been deleted years ago and has no balance shaft. Thanks guys
Keith

 

[gasgasman]

Nice project.
FYI. The balance shaft engine has different mounting points.

 

[gasgasman]

The Gas Gas Quads had counter balanced engines.
Here are your part #s.




https://www.bike-parts-gasgas.com/g...V_2T_WILD_HP/WILD-HP-300/CRANKSHAFT/1/105/0/1

 

[Kbowen4]

Thank you, the motor that i just traded some things for today is a 97 mc, so no included shaft. Hoping someone out there has them in stock

 

[Getoviq95]

You can't add a counter balancer in 2005+ engine ,because the crankcase is smaller .

 

[slocalspode]

You mentioned it is a 97MC? Is it a 4 speed, or 6 speed?
My 98 250cc started life as an MC, but, was changed to
an Enduro EC250 6 speed a couple years into it's early life.
It ran for years with out a counter balancer. Around 2004 or 5
I had Jim Cook of Smackover Motorsports install the shaft
and balancer.
Then in around 2009 or so I converted it into a SuperMoto.
A strange journey in the history of an old GasGas.
I have a .pdf file of the 98-99 motor exploded views with
part numbers if you would like it.
Cheers

 

[Kbowen4]

Thanks for the replies. Crap, i hope its not a 4 speed. I just assumed that it was a mc since it had no balance shaft. Ill check it out tomorrow when i head out to the garage after work. Anyone have recomendations on where i can order a balance shaft. (I dont speak spanish or french lol)
Here it is at the moment. Looks like it had a oversized 250r piston but ill be butting a new jug on it since there is some issues with the current one

 

[slocalspode]

https://gasgas.com/us/dealers

Start close to where you live
and work your way out. Start calling.

There used to be a list of all the dealers in the US a few years ago
you could see on one page. I am sure a lot of those are no longer
in business..... They might be the ones you want to contact first.
The old'time GG business that might have vintage parts just sitting
around.
Try and PM Jim Cook here on GGRider. He no longer works in the
business, but, might have parts or contacts to connect you with.

Steve Marolda, of MotoWest in Anaheim Ca. was the dealer that
worked on my bike when it was new.... Phone: (714) 526-3234
He no longer deals in Gas Gas, but might have some parts on
a shelf.

Remember, there is more parts than just the balance shaft. Weight
on the left side and gears on the right.



Good luck.

 

[Kbowen4]

Thanks, after seeing the diagram, ill be trying to order the bearings, the seal, shaft, and gear and nut.

 

[Kbowen4]

Just checked, it is a 6 speed. Crisis avoided hahaa

 

[slocalspode]

Just checked, it is a 6 speed. Crisis avoided hahaa

Cool. Zoom in on the picture I posted of the clutch side with
the gears for the balancer. The drive gear and the balance gear
each have a dimple on them. In my picture they are NOT aligned.
You have to make sure these two gears are properly aligned
or your vibration will be much worse that without any balancer.
Don't ask how I know.
Cheers, JJ

 

[Kbowen4]

Im not having any luck locating a balance shaft. I wonder if any other two strokes use the identical shaft?

 

[Zman]

Im not having any luck locating a balance shaft. I wonder if any other two strokes use the identical shaft?

I am sorry to hear that but am not surprised. Those parts were/are very popular and have been gobbled up long ago.


I also agree that the shaft in the photo is not timed properly and will run smoother once you align the dots.

 

[Neil E.]

I think the only way to find the balancer parts these days is obtain them from a quad that is being parted out.

 

[slocalspode]

I am sorry to hear that but am not surprised. Those parts were/are very popular and have been gobbled up long ago.


I also agree that the shaft in the photo is not timed properly and will run smoother once you align the dots.

Lol, Thanks Zman. Very much an understatement. You could have
mixed a gallon can of paint strapped to the seat before I fixed the
alignment of the gears. Now you can just about stand a nickle on it's
side sitting on the seat while the bike is running.
I am sure there is a shaft, gear, etc...etc.... (somewhere) here in the US.
Just a matter of finding who has it. Also from a spare motor or someone
selling on old bike for parts could be a source.
I'll keep an eye out for anything and post back here if I see it.
Cheers, Jeff

 

[Kbowen4]

Still trying to locate the parts, ive called a bunch of places but like you said, used off of a blown motor is about my only option