Lard-*** mini bike build

[andrecht]

Nate, they just don't make bikes as they used to. I was running a GS750 for a while, it just never stopped working. Simple to repair and an absolute joy to ride.

---------- Post added at 02:23 PM ---------- Previous post was at 02:19 PM ----------

I thought it was the 1/2" chain, hence the 10T sprocket. Bigger than 60T gets more expensive, at least around here.


If you end up wanting more bottom end...
You could also add a jackshaft, in addition to the TC... if there is room and locating a bigger sprocket becomes an issue.

Really cool build.

There are 74 tooth avaliable if need be, for now I'll go with the 57 and feel the results. Thankfully 1/2" pilot bore sprockets are fairly cheap and easy to come by.

 

[andrecht]

How about a Honda GX390?

 

[chancer]

Yup! That should do it!

 

[Flyinhillbilly]

Yesyesyesyes, 390 all the way!!!

 

[steved]

Having owned a 1986 Yamaha BW200, I only have this to warn you...it will be fun on dirt, but those big tires are hard to steer on concrete and blacktop. Be careful on hard surfaces until you get the feel.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[andrecht]

Steve, I agree with the tires being a bit silly but at the end of the day its all about having fun.

 

[steved]

Steve, I agree with the tires being a bit silly but at the end of the day its all about having fun.

Not silly at all, that was one of the best rides I ever had...

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[steved]

I know the BW200 used a jackshaft to offset the final drive chain around the wider than normal rear tire...probably because a motorcycle engine is narrower than what you are using? They had the jackshaft mounted to the main frame IIRC...bearings were spaced about two inches apart.

The only drawback to that bike was that it ate chains and sprockets...between the traction and the dirt, they lasted about a summer. And being Yamaha-specific, they weren't cheap.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[mckutzy]

andrecht- Cool looking bike... looks like fun.....
However... that motor is from a pump.... and youll have to get that machined or change the shaft to a straight keyed shaft version, in order to mount a clutch/cvt.

 

[andrecht]

andrecht- Cool looking bike... looks like fun.....
However... that motor is from a pump.... and youll have to get that machined or change the shaft to a straight keyed shaft version, in order to mount a clutch/cvt.

There is a lot of work to be done to this motor. It was given to me by a client who I helped out.
He had it standing on his workshop shelf after stripping it out of a Genset many years ago. He was so inspired by my build that he insisted that I take it for free, as long as I show him the complete build.

The carb needs to be redone, valves set, new recoil mech, and fuel tank.
Once I get the motor running, ill strip the crank and machine it down with a keyway for a TAV2

 

[Mr. Spindle]

You will need a 49 series torque converter for a gx390! Tav2 is for like... 1hp - 7hp?


Sent from my iPhone using Tapatalk

---------- Post added at 03:03 PM ---------- Previous post was at 03:03 PM ----------

Whoops, 40 series, not 49


Sent from my iPhone using Tapatalk

 

[andrecht]

Tav 2 30 series is all I can get locally, Import duties is almost double the price of the actual unit.

 

[Mr. Spindle]

Tav 2 30 series is all I can get locally, Import duties is almost double the price of the actual unit.

Good point, but without the matching unit you will burn up your belts quickly and have half the torque, however eBay may have something for you http://m.ebay.com/itm/40-Series-Go-...h-Set-Comet-/360501604988?nav=WATCHING_ACTIVE


Sent from my iPhone using Tapatalk

 

[B.M.800]

This is looking good!

 

[andrecht]

Good point, but without the matching unit you will burn up your belts quickly and have half the torque, however eBay may have something for you http://m.ebay.com/itm/40-Series-Go-...h-Set-Comet-/360501604988?nav=WATCHING_ACTIVE


Sent from my iPhone using Tapatalk

Thanks for the link bud, as I said shipping from the States to South Africa is almost the cost of the actual unit. Additionally we have to pay import duties that makes it just not viable
There is a company that manufacturers agricultural vehicles, the bring in the TAV2 30, as well as other solutions.
Ill contact them in this week and see what they recommend.

Link:
https://g.co/kgs/ASnLfS

 

[andrecht]

Seat covered, foot pegs & sissy bar.

 

[Jfive]

Having owned a 1986 Yamaha BW200, I only have this to warn you...it will be fun on dirt, but those big tires are hard to steer on concrete and blacktop. Be careful on hard surfaces until you get the feel.

Sent from my SAMSUNG-SM-G900A using Tapatalk

You might need to increase the air in the tires on asphalt and concrete. Had a manual steering ranger that gave me a work out if tires were low on air.

 

[chancer]

Those Balls look good on the Pegs. Specially with the FAT design of this Bike.

 

[andrecht]

Series 40 torque converter is 3 times the price of the TAV2.
Ill rather downgrade to the 9hp and stick with the tav 2 I think.

 

[Mr. Spindle]

7hp or less for tav2 8hp or more for #40 series


Sent from my iPhone using Tapatalk