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Discussion Starter #1
A bunch of years ago at an auction I bought an '83 650 Nighthawk that I didn't really want. I had seen/heard a guy ride it around the parking lot, click through a couple gears, it ran well, decent cosmetics. The other guy that didn't want it started the bidding at $25 and wouldn't go past $75, I bought it for $100. I never touched it and other than the odd trip through the woods to neighbours it just sits. Not enough into it to bother selling and not worth putting money into.

A couple days ago I was looking for old dresser knobs in the gold room when I had a blinding flash of the obvious. With my trusty Nighthawk and the equally valuable Datsun rear end, I had just tripped over I could build a Tea Racer.
Kavaki-Gas-Powered-Tricycle-Motorcycle-Bajaj-Pulsar.jpg

I have been looking at how to make it reverse. I can find reversers for drag cars and such that will work, they're British engineer/build, so "say no more". On Alibaba, the Chinese manufacturers amazon, I find the units they use in their Tea Racers but the input/output shafts are at 90 degrees to each other. I need something linear...don't I?
800cc-OEM-power-engine-transmission-gearbox-engine.jpg

I would appreciate the segue "what the fuck is the matter with you" or similar if I am missing something obvious with the Chinese unit.

I was looking for one in the US. I see lots of trike builders but they seem to only sell complete kits.

Anyone with experience on shaft drive trikes?
 

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if you are keeping the chain drive, mount an electric motor with a sprocket connected to the chain, hook it to a momentary switch on the handlebar. When you want to reverse: shift the bike into neutral and hit the momentary switch and the electric motor will back you up. I am assuming with this "tea racer" you are going to want to run a bigger battery anyway, plus the e-motor can act as a spare alternator when it isn't reversing if you wire it right.
 

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Discussion Starter #3
Shaft drive nighthawk, probably a flaw in the initial plan. However you having said that it becomes pretty obvious that the Chinese box I posted is made for a chain drive bike.

So it'll be shaft from the bike to a Datsun roadster rear end. Electric ram for the dump and shitty charging from the bike so I'll put a couple battery boxes and a switch on it.
3680940_orig.jpg

Any idea how they do the shaft trikes in the good ole USA?
 

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yeah the home made ones I have seen use an offset solid axle diff from the front axle of a small 4wd (like a suzuki samurai) with the long side shortened. Then the rider just walks it back when they need to back up.

but most just buy a kit like the grinnal or something.

Home | Grinnall Trikes | http://www.grinnalltrikes.com

I think there is a guy in the UK that does shaft to chain conversions.
 

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Turn it into a fish and chip wagon or something cool like that and ride it to bike rally's or races you might make a killing with it ;)
 

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Discussion Starter #6
The Grinnall is a nice looking trike.

I should have mentioned that it's just for utility and whatever silly things we find to use it for. If it has a box with racks and a slow moving vehicle sign it'll be fine anywhere it would go.

It would definitely be easier with a chain drive. Do think there is a fortune to be made for the world leaders in reverse transmission technology applicable to obsolete motorcycles?
 

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Discussion Starter #7
Turn it into a fish and chip wagon or something cool like that and ride it to bike rally's or races you might make a killing with it ;)
Or Sir, you can have that Rickman you always wanted, maybe two. Tonight, for the first time at Nighthaul Industries, we are opening the doors of opportunity to a few select clients. If you e transfer us a deposit of only $10,000 you can start to design your future. With our engineering department dreams are everyday happenings and you could be dreaming with them. In our BSX 4200 (pictured below) your chip wagon dreams can come true .
Motorized-tricycles-electric-motor-cabin-cargo-tricycle.png
 

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This would be exceptional but I would dress it up as milk delivery. Apparently they get laid allot from all the whispers I hear about my different hair and eyes colour.
 

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Discussion Starter #9
I've been doing some mental engineering on the TR and I think I have a solution for the drive system.

I can connect the output shaft on the motor to a 90 degree 1:1 gear case from something agricultural, like the unit on a small flail mower. A sprocket on the output from the 90, chain to sprocket input on the reverse box. Then shaft from reverse output to rear diff. Not the most efficient system but it should be easier to put the whole thing together. I can centre the bike on the rear diff and then do the alignment with the sprocket shafts. The other advantage I see is that it will allow me a way to change the gear ratio.

Flail mower gear box, spline shaft input
S2001_PROLUNGA_Scatole.jpg .
 

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Discussion Starter #10
This would be exceptional but I would dress it up as milk delivery. Apparently they get laid allot from all the whispers I hear about my different hair and eyes colour.
You might want to get a good magazine and a roll of toilet paper while you're waiting for those milk orders to roll in. We could however custom build for Stevie J's Pool Services.
 

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If you are going to incorporate some sort of right angle drive, can't you use the bikes existing final drive somehow? Sounds like you have to much going on there. What about using the existing final drive from the bike and extend the drive shaft to a home made rear axle. Go to the junk yard and get a viscus coupler ( out of something like and old CRV) to use on the rear axle, so the wheels can move at different speeds when cornering. Not sure how well that would work out with gearing, but smaller rear wheels would help. I assume you aren't going to use it as a skidder. Somewhere on the driveline (drive shaft or rear axle) you can add the Rube Goldburg reverse mechanism. You need a neighbour with a mill and a lathe.
 

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you will want to calculate your gearing
that is make sure it is geared opently low,like 75mph top speed in 6th at redline
see the motorbike clutch is going to be i9n severe service compared to its design
you cant use a lot of speed anyway so having first gear like a granny gear will be va beautiful thing
then for reverse and for a selection of speed ranges,say the datsun rear doesnt give you nice low gearing
well you can kill birds with stones
you need to source a smallish gearbox from a rear wheel drive automobile app
have your machinist fab up a nose housing with bearing and seal to support the input shaft normally supported by the automobile engines crankshaft via the pilot bushing

whith this gearbox mounted somewhere between hawk output and datsun rearend you get reverse and choice of reduction ratios to use
have ing the auto gearbox in top gear is 1 to 1 b
 

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Discussion Starter #13
Car tranny sounds like a good plan, solves the big hurdles. Ideally you could let out the clutch when it's loaded and walk along beside it, a bull low gear. If it will haul a reasonable load at 50mph, that'll work. Knobby on the front rim, set of mud/snows on the back and a dump box all in a 44" wide package. how could it not be useful.
 

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Well with two transmissions, you'll certainly have lots of choices. In your neck of the woods, there must be lots of ATV's and snowmobiles. Maybe some sort of gearbox from one of them? I know nothing about snowmobiles or ATVs other than the the grunt used to have to pressure wash the moose guts off them before they were dragged into the shop. That was the time of year I fucked off to find a winter job.

Maybe something along these lines? BTW.... Aren't you supposed to be working on the #breakingbadmobile or am I confusing you with one of the other bush people?

https://www.ebay.com/itm/1995-Polaris-Magnum-425-Transmission-Gear-Box-Drive-Shaft-Hi-Low-Reverse/362539530267?hash=item54690a381b:g:p2IAAOSwPA1cR5XN
 

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Discussion Starter #15
Well with two transmissions, you'll certainly have lots of choices. In your neck of the woods, there must be lots of ATV's and snowmobiles. Maybe some sort of gearbox from one of them? I know nothing about snowmobiles or ATVs other than the the grunt used to have to pressure wash the moose guts off them before they were dragged into the shop. That was the time of year I fucked off to find a winter job.

Maybe something along these lines? BTW.... Aren't you supposed to be working on the #breakingbadmobile or am I confusing you with one of the other bush people?

https://www.ebay.com/itm/1995-Polaris-Magnum-425-Transmission-Gear-Box-Drive-Shaft-Hi-Low-Reverse/362539530267?hash=item54690a381b:g:p2IAAOSwPA1cR5XN
I didn't get the Travco into the Chipboard Palace before winter set in so no progress was made on it. The approach to my building was never intended for something that long and with icy ground it's just asking for trouble, I'll get it in once things thaw. The rebuilding of it is going to take a couple years and I didn't want to get it on blocks and then need to move it, so I shifted shit around in the Palace over the winter. Now I can roll it into it's space and when I get to the fibreglass and paint work I can build a stud wall booth around it and exhaust to a filter outside the building.

There is still a lot of work to be done inside but the Chipboard Palace is a good sized structure. It's not industrial grade equipment but I've got areas set up for woodwork, metal work, cleanup and painting. There's a space that's a finishing room/mancave, where you can arrive do mechanical shit while watching tv and having a beer and leave clean. If it's a personal project I give it a working space where everything for it is there. If it is something I bought to make money with I don't touch it until I am ready to complete it. I like old bikes and flip several a year but that's just screwin round.

ON THE TRANNY. Actually I'm pretty well versed in sleds and ATV/UTV running gear and considered both as well as the bikes own system, too much fucking around. The Datsun rear end/leaf spring set up makes building the framework pretty easy. I'm going to see what's around that would work for XB's tranny idea, seems to simple and sensible not to be the solution.
 

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Discussion Starter #16
I can't find any info on it, I believe the output shaft rotates clockwise. Can anyone confirm this?
 
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