Duel Predator 2 seater build...

[GearHeadGarage]

Going with a 1988 18hp Briggs twin opposed with a Stock Harley muffler. I think it looks good. Working on the jack shaft mounts now.

 

[bob58o]

Going with a 1988 18hp Briggs twin opposed with a Stock Harley muffler. I think it looks good. Working on the jack shaft mounts now.

I think you are going to want to flip the driven unit around.

 

[GearHeadGarage]

I think you are going to want to flip the driven unit around.

Why do you say that?

 

[KartFab]

Why do you say that?

because its on backwards

 

[bob58o]

I tried my 40 series driven unit that way. The belt kept getting pinched and bunched up in the driven pulley any time I gave it gas Then I remembered 40 series driven units get flipped around and no more issues. A reverse wound spring is required to mount the driven in the same manner as the 30 series (as in the picture).

 

[GearHeadGarage]

Took some measurements and made a new jackshaft / engine mount plate. Made it so both bearings will move when I tighten the chain.
Also added a 3rd axle bearing
I made shims to raise up the engine so the driven shaft bearing isn't in the engine tins.

 

[GearHeadGarage]

Is there a chart or measurement for the shaft centers for the drive belt. Or how tight should the belt be?

 

[Randy H]

If you do a search for comet series 40 pdf, you will find the complete document. Here is a screenshot of the belt and center distance chart

http://bmikarts.com/PDF/Comet_40series.pdf

 

[bob58o]

I'm sure this info is the same as what Randy posted..
Just from a different site...
http://www.gokartsupply.com/beltchart.htm

 

[GearHeadGarage]

Cool wet day today, so looked like a day to work on the campground skooter

 

[B.M.800]

Lookin good.

What kind of speed are you shooting to get?

 

[GearHeadGarage]

Lookin good.

What kind of speed are you shooting to get?

The campground speed limit. And lots of torque for the trails in the woods.
But the sprocket count and tires size it should do 35mph

 

[ezcome-ezgo]

I'm diggin' that front bumper design.

 

[GearHeadGarage]

Messing with a few ideas for the front end and dash. This is one. I like it.

 

[GearHeadGarage]

Getting closer. Stop & Go next...

 

[bob58o]

Getting closer. Stop & Go next...

Focus on Go, Stop is overrated.

You only really need to be able to turn OR to stop. The ability to do both is just a fail safe. LOL

I was testing with no brakes and had a tie-rod come off. Ran into a bush like 2 blocks away. Little kids were laughing at me as I pushed the buggy home.

Looks Awesome. It has come a long way from here...

 

[GearHeadGarage]

Go and stop. Is done, ish.. gas tank, I'll finish tomorrow. Choke is mounted between the seats. The kill switch will be mounted to the choke bracket to.
Battery and starter button tomorrow if I have time.
I'm itching to go for a ride...