New Bike Project By Guitarman (Read 4,484 times)

[cyborg]

i'm actually thinking about sectioning the rear 9-10 inches off of the donor machines frame for the pivot and also easier mounting cause you can trim the tubing from the donor weld it in as a subframe the motor on the swingarm sounds like the ticket

[jct842]

And then there is mounting up the brakes. A proper rear wheel with sprocket and a brake disk already on it and a good welder for the caliper will cure that problem.

[Guitarman]

I was looking at it today and realized I could fit a 15 inch regular motorcycle wheel and tire in there with no problem. There is more than enough clearance to do so. Whatcha think?
It would already be setup for chain drive and have the brakes mounted. Save me quite a bit of work.

Check this out: Almost exactly what I imagined.



AND by raising the swingarm by an inch or two from where it normally would be, I effectively lower the seat height, making the whole bike more friendly. A couple of heavy duty spring boosted shocks on there and I should have quite a smooth ride. I can even go with adjustables.

LOL! I just realized, I drew my chain in blue and they used a blue chain. LOL

[Guitarman]

This last pic has the motor as the pivot point. Mine would be on the arm itself. Much less of an engineering challenge.
Mine will also have a much larger chain on it. That thing is probably quite strong but it looks pretty weak to me. Not to mention the extra cost of non-standard gears.

Now... Does anyone happen to have a pic of my frame in its naked state? I haven't taken mine apart yet because I want to make sure I have it all planned and thought out before I start ripping it apart.
I'd like to see my frame with nothing on it if anyone can find a pic. A side view if possible... Not the parts picture from Roketa.

[cyborg]

The rear swingarm and frame section from a later 80's honda street bike would do nicely or even a more recent honda rebel and if your worried about chain and sprockets go with a 520,,, the best selection of ratios on the planet,,, at decent prices cause dirtbikes eat chains so lots of choice,,,On all my smaller lighter bikes I run 520's I like DID myself

[cyborg]

Oh and I meant to say I think you're on the right track,, a little more research and sourcing and I think you'll have this project on it's way and licked solid

[Guitarman]

Looking at the different wheel sizes available, I'm beginning to wonder if it wouldn't be easier to just tack weld a mount plate for the chain sprocket and brake rotor on the existing wheel..
$300 and up for a single wheel! And they don't even match!

[Guitarman]

Ok, I might be stuck with the scooter wheels. So then I need to mount brake rotor and drive gear on the same side of the bike. The wheels are not made for two sided mounting. How about this? Anyone see any problems?

Extra long bolts to mount the gear, spacer (aluminum ring 3/4 inch) brake rotor. Anyone? Or should I just drill the holes thru to the other side so I can dual side mount?



What I have now:

[cyborg]

If it was my call i would have a flange machined and pressed on the drive side and welded around ,,,and i would again look at mini offroad bikes for the sprocket so if you wear it out its an easy change,,,again lucky you ,,,you don't have to mess around with a cush drive cause the motor is so much smoother than an engine,,,,if you measure things well i think the only thing to worry about would be lining up the chain,,spacers are the answer to that

[cyborg]

Just had a thought,,and it may or may not work i have not seen what the engine configuration is on this machine,,,,can't you cut the engine out of the system and mount the motor in it's place?

[Guitarman]

Unfortunately, the engine IS the mount for everything behind it. They designed it that way to keep you buying parts from them. Had it been a normal cage and swing arm, you could source parts almost anywhere. Not on this contraption.
That's a big part of why I'm so aggravated with it.

[Guitarman]

I was getting ready to start taking my bike apart today when someone asked me if I hated the engine so much, can't I put a different engine in it? Maybe one from a different scoot that I like? Or a regular bike engine? I paused, set the chainsaw down and thought for a moment. .....

"Hmmm... I'm not sure if I can do that." I said.

So, now I wonder... Could I sneak the motor from a 400 Burgman in there? Would it fit? Would I have to re-arrange the frame to make it fit? Is there even room for it?

Options... What if I put the electric motor on the CVT? Is that stupid? Would the CVT (with the clutch permanently engaged) give it a higher top end? Or am I right in thinking I'd lose all kinds of speed from the CVT? Or can I remove part of it and just use the drive gears from it with the Electric hooked direct?

I suddenly realize I don't know what kind of gear ratios the CVT is actually providing. 244cc clone is what I have now. if that helps to answer this.

This pic is a Burgman 400 engine. Look familiar?

[cyborg]

this might just work...much easier to install a working engine trans combo,,,you may have to make a frame mounting tab or two,,,and as far as fit goes your scooter is pretty big,,,,

[Bashan]

You are doing what a lot of people have done in the past, you're assuming that because you've had problems your bike is toast and you have to take a flamethrower to it. Maybe you got a boge engine...it happens. How much money were you ready to spend G Man? It sounds like a crap load. For a K and some change you could call Mike at BPNW who specializes in these motors and he would send you a KILLER 244 that would run forever. Got a few more bucks? Have him build you a performance 244 and hang onto your head rug bud. The 244 is based on the legendary Honda Helix engine...it's not a good engine...it's a great engine. Get a good mill in that bike, rewire the electricals, boom, your scooter is bulletproof. I would NOT put a Burgie 400 in a 250 frame, it was not designed around that. You could unexpectedly develop a high speed wobble at like 75 and be down bradda.....don't do it. We had a guy with a 250 in a 150 frame and it was dangerous. Rich

[Guitarman]

Is Mike on the board here? I'd like a price from him for that. Because, yes, it gives me so much trouble that it's become more problem than solution. I felt like launching it into the sky as a firework today.
If I had a solid engine, I mean SOLID, I'd be happy to keep riding it on gas. But... I only have so much Scratch. Us teachers don't get paid you know.