kvelth01

I just bought this sled and put a different motor in it and now it goes in revers what could be the case of why its doing such a thing!

Jon117

I would guess the crank rotates the other way. like some cars or trucks do

__________________
- 97 Polaris RMK 700 current rider lots of mods done apparently (thats how i bought it )

- 98 Mountain Max 600 (needs upper end rebuilt (spring time project)

- 98 Ski-Doo Skandic 500 WT bad boy has high low reverse and electric start and will go pretty much anywhere (will be rebuilt in spring but road like it is till then)

kccats

What motor did you put in?

kvelth01

It was out of a Yamaha Enticer 340 i didnt think it was gonna be this big of a deal

kvelth01

Jon117 what do u mean?

Jon117

Im not a big 2 stroke guy but ive worked on cars most my life. Some vehicles the engine rotates the opposite direction (counterclockwise vs clockwise or visa versa) is it possilbe that the engine you put in rotates internally the opposite direction of the orig. could that make the sled go in reverse? sorry im not nearly as familiar on 2 strokes as i am on vehicles

__________________
- 97 Polaris RMK 700 current rider lots of mods done apparently (thats how i bought it )

- 98 Mountain Max 600 (needs upper end rebuilt (spring time project)

- 98 Ski-Doo Skandic 500 WT bad boy has high low reverse and electric start and will go pretty much anywhere (will be rebuilt in spring but road like it is till then)

Jon117

I would think that (mind you if 2 strokes are that way at all) could cause everything to rotate backwards causing the sled to go rev. instead of normal

__________________
- 97 Polaris RMK 700 current rider lots of mods done apparently (thats how i bought it )

- 98 Mountain Max 600 (needs upper end rebuilt (spring time project)

- 98 Ski-Doo Skandic 500 WT bad boy has high low reverse and electric start and will go pretty much anywhere (will be rebuilt in spring but road like it is till then)

kccats

NO. They all rotate the same way! (only exception I just learned here about is the Kitty Cat!) We have gone threw this just a little while back! First why did you pull the old motor? Did the new motor back fire and staert running backwards?

Jon117

Thats good to know! Thank you! I know in vehicles that was a rare deal but did exsist.

__________________
- 97 Polaris RMK 700 current rider lots of mods done apparently (thats how i bought it )

- 98 Mountain Max 600 (needs upper end rebuilt (spring time project)

- 98 Ski-Doo Skandic 500 WT bad boy has high low reverse and electric start and will go pretty much anywhere (will be rebuilt in spring but road like it is till then)

kvelth01

Nope this engine is spinning backwards its running backwards which means the wiring is backwards

kvelth01

Thats the only thing i can think of is that somewhere down the line i have wiring that is going backwards

RJ Gleason

No it does not mean that the wiring is backwards.
More likely the timing is so close to TDC that a backfire will actually reverse the engine.
The CDI controls the spark by way of the Trigger coil at the flywheel.
If that is in the wrong spot, what will happens is what did.

__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Senior Warden; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!

ken3296

How did you start it? It should run in the direction the rope pulls in. Unless like RJ said, it backfired when you pull it and it kicked in the opposite direction.

kvelth01

Well it starts and it backfires and the engine runs backwards cause the sled goes backwards

kccats

Has anything been done to the timing, fly wheel or stator?

kvelth01

Rjgleason what does that mean

kvelth01

Nothing at all

RJ Gleason

TDC = Top Dead Center.
If the timing is too far advanced any misfire will cause the engine to run backwards.
All it would take is to have a sheared timing key in the flywheel or maybe it got pushed out when the flywheel was installed.

Are you using the CDI for the 340 or one from a bigger engine?

__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Senior Warden; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!

Scorp80

It sounds like the engine timing is way way off. Most likely because the woodruff key on the flywheel sheared or rounded over.

__________________
Think Snow.....

kvelth01

How would it have done that when i didnt take or mess with the flywheel at all