300/440/550 Are 685cc 6M6 kits obsolete?

[afcblink]

A lot of literature I've read in the past few years mentions 80mm pistons for the 6M6, giving 685cc. The only big bore kits I can find for the 650 motor currently are 701 (81mm) kits.

Are the 685 kits suddenly obsolete? And if so, why the switch?

 

[WaveDemon]

A lot of literature I've read in the past few years mentions 80mm pistons for the 6M6, giving 685cc. The only big bore kits I can find for the 650 motor currently are 701 (81mm) kits.

Are the 685 kits suddenly obsolete? And if so, why the switch?

suddenly? if by suddenly you mean 13 years then yes, they are suddenly obsolete.

 

[afcblink]

suddenly? if by suddenly you mean 13 years then yes, they are suddenly obsolete.

Gee, sorry I asked. They were mentioned in a PWI article in 2005, and still referred to on the Group K web site. Sorry to waste your time.

 

[The Penguin]

I would imagine for the price you pay for a complete big bore topend for a 650, you could pick up a complete 701.

 

[WaveDemon]

Gee, sorry I asked. They were mentioned in a PWI article in 2005, and still referred to on the Group K web site. Sorry to waste your time.

don't take it the wrong way. It's an old and very cheap motor. any mods you do will be worth more than the motor and the results will be sub-par compared to a 701 based motor.

 

[afcblink]

I would imagine for the price you pay for a complete big bore topend for a 650, you could pick up a complete 701.

I've been offered a free 6m6 in need of a crank.

 

[The Penguin]

free is not always cheap. LOL

it also sounds like it needs a top end.

a used crank - $150 or so. I'd guess that topend would run at least $200

add machinist time for boring, a gasket kit, and your time to assemble and that "free" motor just cost you $500

 

[ATS_Aaron]

Haha, free 650 that needs a crank..um the crank is the only thing worth anything in a 650 (because it fits 701 and 760).

Aaron

 

[afcblink]

Haha, free 650 that needs a crank..um the crank is the only thing worth anything in a 650 (because it fits 701 and 760).

Aaron

I believe that's what happened to this one's.

 

[afcblink]

free is not always cheap. LOL

it also sounds like it needs a top end.

a used crank - $150 or so. I'd guess that topend would run at least $200

add machinist time for boring, a gasket kit, and your time to assemble and that "free" motor just cost you $500

Okay, if somebody will just point me to where the $500 701 motors are...

 

[The Penguin]

got to keep your eyes open and an ear to the ground.

I traded a new hood and nosepiece for one. ($400 value)

someone else I know found a wrecked blaster for $200 (good motor in it.)

and watch the classifieds here and at PWCT

 

[WAB]

comes complete with wiring box & aftermarket head.
yamaha waveblaster superjet 701 engine and electrical
Item number: 220254779317
http://cgi.ebay.com/ebaymotors/yama...ryZ56422QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

use this search for yamaha motors on eBay.
http://motors.search.ebay.com/yamah...fmtsZ1QQsacatZ56422QQsaobfmtsZinsifQQsbrsrtZd