what is this?

[hitatreeonce]

anyone what this is looks like it was once watercooled the pump has been pluged up has a hydrolic clutch no on frame is 3650488 cant find one on the motor any help appreciated

[paul]

85 frame I think .the photo is bad ,you sure there no engine number

[hitatreeonce]

There is a number on the barrel but it doesn't fit properly some of the fins would have to be trimed to clear the down tube I cant find any numbers on the cases

[Maicoman]

Looks like an 85 frame, but it has rear shock mounts and perhaps an 85 250 motor that someone has tried to fit a 490 barrel to or someone has just fitted a watercooled clutch cover to a 490 motor.

 Do all the lower frame mounts match up because 84 & 85 are different?. There is an extra lower mount. Looks like a custom airbox, perhaps a works bike or just a bitsa?

[hitatreeonce]

Looks like an 85 frame, but it has rear shock mounts and perhaps an 85 250 motor that someone has tried to fit a 490 barrel to or someone has just fitted a watercooled clutch cover to a 490 motor.

 Do all the lower frame mounts match up because 84 & 85 are different?. There is an extra lower mount. Looks like a custom airbox, perhaps a works bike or just a bitsa?

All the mounts line up Doubt its a works bike but if the rear has been retro fitted its a good job

[evo550]

I'd say the subframe has been grafted to another frame to suit dutch twin shock and the same with 83/85 500 cylinder. The main frame doesn't look like any Maico frame I've seen, although I've never seen a naked waterpumper 500, saying that I can't see any rad mount points.
The U.S did have 1985 air cooled 500's.

[evo550]

The 365 frame number comes up as a 1985 gm 250
http://www.maicoonly.co.uk/engine-and-frame-numbers.html

[hitatreeonce]

Thanks fellas from what I can figure out its a retro fitted twin shock liquid cooled 250 with a 490 barrel grafted on

[evo550]

Thanks fellas from what I can figure out its a retro fitted twin shock liquid cooled 250 with a 490 barrel grafted on

Life's like a box of choclates......you never know what you're gunna get...

[09.0]

The air cooled barrel from the later bottom end bolts on. Is this a bike you have stumbled onto? I have just bought a similar bike in bits. Is it a blue bike (plastics).