swaping cylinders

[evo550]

Is it possible to fit a cylinder from an '81 490 on to an '82 490 motor ?
And what other differences are there between the two....anything that would cause scruteneering issues at a title event such as tassie?

[090]

I have an '82 motor in mine and it is legal. Not sure if they interchange but i would guess that they would

[evo550]

Even though it's a motor derived from a pre '85 bike?

[Maico31]

The motors are the same although the '82 supposedly has slightly different porting.

[evo550]

Oh! When did Maico go to reed valve?

[xel93]

The 82 cylinder bolts straight on.  It does have slightly different porting and produces more torque - it is noticeably better than an 81 cylinder.  Stock reeds came in with the change in motors in 83

[firko]

The 82 GS 490 Enduros had reeds. All 81-83 cylinders are interchangable.

[evo550]

I realise it's not really an issue at club level, I guess what I am tyring to find out is if I was to venture to Tassie for the titles, would a reed valve "Pre 85 " barrell be allowed in the evo class?

[Maico31]

I would think that a reed valve cylinder from a '82 490 enduro would be legal because that bike was still a twin shock.

[East Coast Maico]

In the States the reed valve bikes with Magnum engines were 1983 Spyder E. is was basically a 82 enduro with Ohlins shock and the reed cylinder. Hard to find around here.
Bill

The 82 GS 490 Enduros had reeds. All 81-83 cylinders are interchangable.