1911 Indian

[Tre_in_L.A.]

Also, just on the flywheel topic. I work in the industrial pump industry and (kind of)specialize in metallurgy and casting processes. In my experience, there is a significant variation in quality of cast parts from China. Some are outstanding, some are absolute junk and less than worthless due to things like porosity and the wrong application of finishing processes and heat cycles not even coming close to meeting ASTM standards. Chemical contents can be way off. Not just China either. Its all about, as everyone knows saving money.
IOW, (some) stock flywheels may be good to 6K and (some) may not even be good to 3K.
Depends on what was going on at the foundry that day, kind of. My guess is that the stock flywheel may be OK to some test runs but should be replaced with a billet before, I don't know, 20 hours of operation. ?? Hard to tell. Even if you choose to have the stocker dye penetrant or magna fluxed tested, thats the cost of a billet anyway.

Just something to think about. My .02

 

[cobrafreak]

BTW I got a billet flywheel for the rust resistance. I read that if you take the stock flywheel when off the engine and put your finger in the center hole and lightly tap it with a small hammer at various degrees along the edge (don't hit magnet) you should hear a bell ring tone. This is good. If you hear a dead thud somewhere the flywheel is bad. This is also how they test tool casting and forgings off of an assembly line.

 

[cobrafreak]

Look at the difference between the stock cast aluminum connecting rod and the billet ARC connecting rod. I don't think this unit is going to break. Almost too beautiful to keep inside an engine. Got it at AGK.

 

[cobrafreak]

I got the transmission today!
It was mis delivered to the same street number but different street. Haha. Ok, I have it sitting on the engine and the engine sitting on the frame:

In order for pedal clearance on both sides and the final drive chain to perfectly hit the rear sprocket strait the engine block centerline needs to be 2.5 inches farther out the right hand side. Hey, valve adjustments will be doable with the engine in the frame.

 

[Lurker]

Is there anyway to tilt the engine towards the rear of the bike instead of forward? I am afraid you may have oiling issues. It would be more natural for the engine to lay closer to the direction it was designed to be mounted. I don't think you can see it in photos of my bike but it has a slight lean toward the rear. That's just my two cents tho.

 

[cobrafreak]

Oh yes, don't worry about that. The only reason for this mock up is so I know where the comet plate needs to be to line up with the rear sprocket. I will need to make new mounting holes in the plate to get it exactly where she needs to be. I just wanted to see it on the bike to study the geometry.

 

[harry76]

Thats looking awesome Cobra. It looks from the photos that it will be a perfect fit. I cant wait to see this one..... This seriously makes me want to upgrade the 3hp Briggs powerplant in my Indian build.....

 

[cobrafreak]

Here you go Lurker. I had to "invent" and new series of mounting holes on the comet plate and trim a little on the bottom edge and there you go, it leans slightly to the rear. I'm in good company here Thank goodness for 1/2 inch drill presses.

 

[cobrafreak]

Thats looking awesome Cobra. It looks from the photos that it will be a perfect fit. I cant wait to see this one..... This seriously makes me want to upgrade the 3hp Briggs powerplant in my Indian build.....

Thanks. This is uncharted territory for me and I'm really just playing it by ear. It seems to be working so far. (fingers crossed)

 

[harry76]

I love it.

Just a thought. Is that the final engine plavement?.....It would be a lot of work but if you bent a new downtube that followed the front wheel it would probably leave enough room in the droploop do drop the motor and help with handling.

However it looks great the way it is. If you can make the motor vintage looking and register this thing like you said, you will be fooling a lot of people that you are riding a real indian boardtracker. This thing would be so much fun. I doubt we will hear from you again once this is going as you wont wanna get off it. I know i wouldnt. Nice work.

 

[cobrafreak]

Hey, I found out something today. The Comet transmission uses 41 chain and the rear sprocket uses 415 chain. The 415 chain would not work with the Comets' 41 front sprocket. I went to a lawn mower shop and got 10 feet of 41 chain and it works on the front and the rear 415 China girl sprocket. The chain is just a hair wider but it is the same spacing and it works great. The nice thing about 41 chain is you don't need to mail order it. It is sold at every lawn mower shop, and it's cheap.

 

[harry76]

And i cant believe how much you get these motors for over there. They are cheaper then the chinagirls arent they? I had a look on EBay over here and the 5.5hp copies are $250 delivered :-( I dont know if i could source a cheaper one through other retail chains (go-kart supplies,hardware???). I am looking at a genuine Honda GX160 second hand.

So if yours is a GX200 clone how many HP is that? Do you have any expectations or predictions on speeds? And what would you trust your tyres up to? Im thinking this is gonna scoot

 

[LS614]

That looks sweet! You're a fast builder. I like that you get things done

 

[cobrafreak]

And i cant believe how much you get these motors for over there. They are cheaper then the chinagirls arent they? I had a look on EBay over here and the 5.5hp copies are $250 delivered :-( I dont know if i could source a cheaper one through other retail chains (go-kart supplies,hardware???). I am looking at a genuine Honda GX160 second hand.

So if yours is a GX200 clone how many HP is that? Do you have any expectations or predictions on speeds? And what would you trust your tyres up to? Im thinking this is gonna scoot

A GX160 is 5.5 hp. A GX200 is 6.5 hp. Just a 40cc difference between the two. Lurker got his up to 65mph before he let off the throttle. He has disk brakes though. I run drums. What am I comfortable with? I don't think I would like to go over 55mph. The Thick Bricks are woven with Kevlar, so they are not going to shred easily. As a matter of fact, I went over a rock and it cut a 1 inch tear through the tire and burst the tube. I put another tube it in with the tear still there and ran it for a couple of more months before I replaced. It's a tough tire. What will the bike be capable of? Board track racers could go 100-110mph with 4 hp singles back in the day. If I register it as a scooter I could theoretically be legal to take it on the freeway. I don't think I would want to unless I had tires that could go 70mph because everyone goes at least 70mph. I'm not really out to go fast. I just wanted to get the 4 stroke sound and be able to go with the flow of traffic around town.

 

[cobrafreak]

This is how the engine will sit. Everything is just tack welded on and additional gussets need to me made, but everything fits. I painted the head with high heat black exhaust paint. It looks old school and it will help dissipate heat.

 

[LS614]

Again, I say, I really like this build. You do very nice work and I hope this one proves more reliable than the first Peace
-LS

 

[oldtimer54]

Say where are you guys getting these Comet transmissions? Ive got this motor but having a hard time finding the tranny. Thanks

 

[cobrafreak]

Say where are you guys getting these Comet transmissions? Ive got this motor but having a hard time finding the tranny. Thanks

affordablegokarts: CLUTCHES & JACKSHAFTS


http://www.mfgsupply.com/m/c/218352A.html

 

[oldtimer54]

Cool thanks cant wait to get started.

 

[cobrafreak]

Made the engine mounts complete. Bullet proof. Guaranteed not to ever twist, bend, or come apart. I built it like an airplane frame.