For Kel: B Grades bucket build

[Henk]

You might have to do a bit of digging about but

http://www.jtsprockets.com/48.0.html

Is about the best site I have found for sprocket info, I think your engine is a TS125 in which case the stock from is a JTF425

[jasonu]

I seem to be a bit stuck, the original Aprilia rear sprocket is a must keep due to it's weird shape and the fact it is splined they are easy enough to get hold of as well.
The front suzuki one is s different pitch.
The Aprilia is I think 415 and I need to make a suzuki front in the same pitch, any idea's would be gratefully received.

Thes guys make them but I hate to think what they would cost http://www.rebelgears.com/sprockets.html

415, 420 and 428 all have the same pitch but differ in width. I would be surprised if the Aprilia has 415 as standard.

[TZ350]

Isn't 415 used by Honda RS125's? I have seen Chambers slim down 428's to match RS sprockets.

[cotswold]

415, 420 and 428 all have the same pitch but differ in width. I would be surprised if the Aprilia has 415 as standard.

Well if that is the case I can get 415 rears for the Aprilia and then get the front ground down?. I was a bit suspicious of the rear I have, as the chain off the suzuki starts riding over it at about 1/2 way.
http://www.andysmotorcycles.com/inde...cPath=2_22_145

[Ivan]

i had the same problem they do run a 415 standered im pretty sure and i had the sprocket machined down and then a bolted a fatter sprocket onto it dont know how it came out kyle now has the bike talk to him quallman1234 he is running a ts engine in his frame as well i think

[Bert]

A KTM65 also runs a 415 chain and sprocket; not sure what the spline looks like for the front nor the mounting on the rear; but someone could find out if they looked hard enough.

These guys have been great to deal with. they also stock a good selection chains (415 from $39):
http://www.mxshop.co.nz

[jasonu]

Isn't 415 used by Honda RS125's?

Yes that is correct.
Last century I had some front 420 and 428 sprockets ground down to 5mm (415 thickness).

[jasonu]

Well if that is the case I can get 415 rears for the Aprilia and then get the front ground down?. YES
I was a bit suspicious of the rear I have, as the chain off the suzuki starts riding over it at about 1/2 way. Either your chain has a different pitch to the sprocket or the chain and/or the sprocket is stuffed.http://www.andysmotorcycles.com/inde...cPath=2_22_145

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[cotswold]

If it had an exhaust , brakes and sprockets that matched it could almost be ready to try a driveway run. I still have to get something done with the front engine mount and am thinking of running a removable down tube from under the twin spars.
The dummy tank is nice and quick to remove so plug access is easy.
The main tank on the bike is plastic and too deep with the GP in it, does any one know if it is feasible to cut off the bottom and plastic weld a flat base to it?
If not it will be the twin plastic tank idea that somebody came up with.

[cotswold]

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The chain and front sprocket are off a Suzuki GP125 I bought so should be 428 but the rear is the Aprilia one and I have no idea what pitch it is apart from what I could find on the net. ( 415 )

[koba]

does any one know if it is feasible to cut off the bottom and plastic weld a flat base to it?

No idea, but I was possibly going to try it as an option. Let me know how it goes if you try it first!

[Pumba]

..........does any one know if it is feasible to cut off the bottom and plastic weld a flat base to it?
If not it will be the twin plastic tank idea that somebody came up with.

I don't have a clue if plastic welding a new base is possible. Personally I would want assurances that the tank would not leak once it was completed and I am not sure anyone doing it would give you that.

If it was me I would cut the base out and then place the plastic tank(s) in the cut out upper and then foam fill around it with expanding polyurethane foam.

[jasonu]

The chain and front sprocket are off a Suzuki GP125 I bought so should be 428 but the rear is the Aprilia one and I have no idea what pitch it is apart from what I could find on the net. ( 415 )

Get a 415 chain and have your 428 front sprockets ground to the correct 415 thickness (5mm from memory). That will give you a lighter set up.

[cotswold]

I don't have a clue if plastic welding a new base is possible. Personally I would want assurances that the tank would not leak once it was completed and I am not sure anyone doing it would give you that.

If it was me I would cut the base out and then place the plastic tank(s) in the cut out upper and then foam fill around it with expanding polyurethane foam.

I am going to do something similar using the tank cover, I was just thinking of modifying the tank I have rather than buying another

[F5 Dave]

erm, ideally 420 goes to 415. 428 has a different pitch as the bushes are a bigger size. Think you have to take it down to 4.3 to give clearance & bevel the edge (numbers only from jaded memory). Ally rear spk is easy to do on mill & file the bevel. Front spkt will need munty cutters so take to an engineer to grind.