The Board Track Racer, Briggs powered---Video

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Re: The boardtrack- bobber-bicycle looking thing...

Gdcast said:
Nice! That thing is looking massive!
How about more pics?


I'll get some more tonight. I have the next few days off. So I hope to have the engine mounted and to start work on the jack shaft.
 
Re: The boardtrack- bobber-bicycle looking thing...

Beau said:
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you just got my attention. definitely an idea to keep in the mental file. thanks.
 
Re: The boardtrack- bobber-bicycle looking thing...

Did a little work tonight.

This is ugly-

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So I took it off for now so I have room to adjust the engine-

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And since I only have bike tools and parts I did this-

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But now I have to move the pedals-

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And two final shots-

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Re: The boardtrack- bobber-bicycle looking thing...

Today I got pillow bearings, a three foot 3/4" steel bar and some 3/4" (19mm) BMX bottom bracket parts.

I had some plate left over from another project and cut out a mount for the two pillow bearings. The pillow bearings hold a 3/4" shaft I cut down to 10". I got the bearing mount welded to the seat tube, so the jackshaft is now in. I need to buy one more pillow bearing tomorrow.
Since I hacked away my oil filler/check on the front of the motor, I needed to make a new one. I bought some brass pipe threaded on two ends, a 90* elbow and a brass cap. I also purchased a pipe thread tap so I can tap the block and put in a new filler/checker.

I also got my throttle lever welded on to the handlebar. I'm using an old Shimano 3-speed shifter flipped upside down and welded to the bar. It took some modifications to make it work. .

The shifter looked like this-

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I have a lot of pictures. I will have to post them tomorrow.
 
Re: The boardtrack- bobber-bicycle looking thing...

Pictures from yesterday.

Here is the jackshaft mounting plate with one pillow bearing mounted. I made it with a cutoff wheel, drill and skate sharpener!

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The new oil check/fill

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Here's one of those "Hey Beau can you use this metal" moments. A piece of a store fixture happen to fit a euro BB quite well.

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A trip to Fleet Farm (a.k.a. The Man's Mall) turned out to be really helpful.

I found collars that fit different size sheaves (pulley's) that had a 3/4" bore. I had to buy the collars and sheaves separate and will have to weld them together. The sheave slides on tightly to the collar too.

I stumbled upon 1/4" copper tubing in a 10' roll for a little over $5. It will fit 4mm or 5mm cable housing and I'm gonna use it to hide the throttle cable and brake cables.
 
Re: The boardtrack- bobber-bicycle looking thing...

I am jealous of you build. I have to ask, where did you find that motor? I have been scouring craigslist for that type of of thing for my current project but have come up short. Anyway good work I can't wait to see more.
 
Re: The boardtrack- bobber-bicycle looking thing...

Type in "reel mower" :wink:
 
Re: The boardtrack- bobber-bicycle looking thing...

I have the jack shaft mocked up now. I'm gonna need to gusset the mount a bit, but it should work good. I also need to shorten the jack shaft. Final word...It's not gonna pedal. I'm probably gonna have a tensioner pulley mounted on the chainstay too.

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And the throttle lever-

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Re: The boardtrack- bobber-bicycle looking thing...

:shock: :shock: :shock:
This is the first one I would really really like to ride.
I´m sure is gonna sound and look great.
Keep building!
 
Re: The boardtrack- bobber-bicycle looking thing...

Some of the old racers had a strap to hold the right pedal arm to the chain stay, since they didn't need to rotate.
 
Re: The boardtrack- bobber-bicycle looking thing...

I went to the steel yard today and picked up steel for the gas tank. I spent a good part of the night making a pattern and it's not the most fun thing I could be dong. I hope to have the pattern done tomorrow and the steel cut.
 
Re: The boardtrack- bobber-bicycle looking thing...

i was planning on doing this 8) jealous
 

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