You might get some information from this thread.
http://www.gasgasrider.org/forum/showthread.php?t=2228
There are some pictures posted there that might help
identify your motor. It may either be a Morini or maybe
an older Derbi. I have a picture of my 2002 Derbi SM 50cc
posted there.
I believe the 50cc GasGas SM motor to be the same as
the TXT70 Rookie motor and it is a Morini. Your 65cc may
also be the same bottom end......maybe not.
Good luck. Jeff

Hi

After hours and hours and hours, I think that I have found it!
http://www.rcscooter.net/manuales_ta...er_sm_2003.pdf

All the part numbers look the same, but the above is a 50cc?
The GG has a hydraulic clutch where the Derbi has a cable. That probably why the GG manual is up the pole! They used the same manual?

GG part pdf - http://www.gasgasmotos.es/eng/frame.htm

Look under 2006 - MC 65

The barrel is a MK (Metrakit)..... still working on this one

There is light at the end of the tunnel!!!!!!!!!:)

Something else that I found very interesting - http://www.charamon.info/catalog/pro...ducts_id=12785

Can anyone read more into this?

I have solved most problems finding out what is what and where to get what :confused:

I will take me a while to condense all the info. If anyone has questions in the mean time, just post it here.

Here come the 1st MC 80 :)

Yes, please keep us posted. I have a friend with
a EC50SM that would like to to "BIG" some day.
Thanks, Jeff

Had a problem with the 65 and the damage in Euro's was considerble.
€ 130,- for a piston :eek: a new nikasil for the cilinder € 196,-.
All due to a wrong way to restrict the bike for my son.
I derestricted the bike and now it's ok.
:)

The barrel and piston is a Metrakit , if you have to buy new, go straight to one of the retailers of the kit, it's much cheaper than the GG factory. You won't find a 65cc but a 71cc and 80cc. GG factory must have made a deal once off with Metrakit to make their 65cc top ends and then bolted it to the Derbi bottom end.

I love my GG's but that MC 65 has been a pain in the butt for information and I think that the jetting for the Deletro carb was a complete "after thought"

:) Intresting, it was difficult to find other then GasGas parts wich would fit on the 65.I don't say that i wil but it's nice to see it can.The former importer for the netherlands ,Oerlemans , is very far in development of the 65.
He pointed out that ignition is a problem when you push the bike to the limits.
Heat causes problems. The only way is a aftermarket one. Thanks Brains!:)

For most parts you don't have to but from the factory.

The bottom end being a Derbi Senda 50cc, you can just get Derbi parts.

I can't remember what I worked out about the hydrolic clutch, I think it was a Derbi part as well.

The AP brakes are used on other bikes like Polli.

As mentioned, the top end is Metra kit.

The reeds are Derbi

The pre 08's were Delerto and then the factory came to there senses and fitted a Mukini. I have tried the Mukini 24mm, same as the KX 65, it was much better.

The expansion chamber is very much like the KTM 65

The rear plastic comes from the same mould as the KTM and even has a KTM stamp on it, just different colour.

Painterman - the electrical problem was the coils going faulty. We had them rewound and had no more problems after that.

What did Oerlemans find out and do with the MC 65?

I still have a MC 65 sitting in pieces and not sure what I may do with it, maybe Oerlemans will give me some inspiration. My main problem with it was that the bike has no bottom end power as from factory. After big mods we sorted some of the problem out, but it is still no where near the power of the KTM SX 65.

Brains, i will try to pass it to Oerlemans. Although i'm very intrested in technics, i have not full wisdom :o (far from that) so i have to ask him about it.
It may take i while.
What i do know is that the boys who ride it in the Netherlands sit in 11000-13000 revs/min, according to telemetrie on the laptop