Rear wheel

jonne123 · 4 Mar 2020, 18:42

Different forks? Swingarm? What can you recommend and most cheaply?

Calum · wrote on 3 Apr 2020, 17:44

@jonne123 Yeah you know, the Aprilia has completely different geometry to the DTR. So it's going to need fabrication.

The front and rear wheel need to be aligned. The front and rear sprockets need to align. The wheels need to be centralised. Cause it's from a completely different machine.

jonne123 · 3 Apr 2020, 17:47

maybe spacers like the has my uncles friend is machinist

Calum · wrote on 3 Apr 2020, 17:46

If money is a concern, stick with what you got and put some decent tyres on it.

Even Excel rims are expensive and require work. So there is no one easy solution.

The easiest way to do it would be to buy some nice and expensive Excel rims, and lace up your hubs to them That way you retain the original brakes and spacers and geometry with SM Rims.

The DTX solution, you need forks, brakes and wheels. These were hard to come by new, now it's practically a nightmare.

Calum · 4 Mar 2020, 18:48

@jonne123 If you don't mind fabricating parts, then you'll need spacers and the hub carriers modified to take the bigger brakes. and a bracket made to mount the brakes to the wheels.

Can see the work required in my DTRE build thread as I run RS125 wheels on my DTR.

jonne123 · wrote on 3 Apr 2020, 17:47

I know i need brake caliper upradge nad change just brake leg on right. on rear put the wheel backwars

jonne123 · wrote on 3 Apr 2020, 17:47

can you link the thread

Calum · wrote on 3 Apr 2020, 17:48

No, you need to centralise the wheels, rotate the tyres and also line up the front and rear sprockets. Otherwise you'll chew through rear sprocket carrier bearings in no time at all!

Calum · wrote on 3 Apr 2020, 17:49

https://dt125r.co.uk/topic/15/the-leviathan-project/127

jonne123 · 4 Mar 2020, 18:52

but the axle radious is the same? can i keep front brake caliper at left side?

jonne123 · wrote on 3 Apr 2020, 18:00

does stock rs hub carries fit?

Calum · wrote on 3 Apr 2020, 18:03

No nothing fits, it all has to be fabricated. Even the spindles are different sizes.

The front spindle is too small. Rear spindle was okay.

Calum · 4 Mar 2020, 19:05

If you have access to a machinist, the cost is minimal. But it all adds up. Hours on the lathe and precise measurements were necessary to get all the stars to align. I had to shim the rear sprocket to get it to fall inline with the front.

When I took the bike in to have the tyres replaced. They omitted the shims and the rear sprocket carrier bearing collapsed shortly after. So it does have to be on point.

jonne123 · 4 Mar 2020, 19:13

And in summer i go to machine shop for summerwork so i can make them afterwork.

And are the rims same size if you can give some measurements of the parts?

How about the speedo?

Does the ride quality increase

declan · wrote on 3 Apr 2020, 18:24

@jonne123 WR 125 wheels fit

jonne123 · 4 Mar 2020, 19:32

But could buy those for 20€

So 20€ for skf wheel bearings

front brake disc

-Rear sprocket

-speedometer drive

front caliper

-fabrication metal

So i would image around

200€

So not that bad

declan · wrote on 3 Apr 2020, 18:36

it very rarely is as easy as you expect but i suppose if you follow callums build thread in relation to your wheels you will be okay

jonne123 · wrote on 3 Apr 2020, 19:03

I plan to do this as simple as possible.

Rear:

Sprockets and 520 chain

Spacers

Front:

Spacers

Speedo drive

Front axle

Brake upradge

Calum · 3 Apr 2020, 19:20

@jonne123 You need adaptors for the brakes!

You have to centralise the brakes over the disc, otherwise one side of the pad will just bind against the disc.

It's a lot of work. The easiest thing to do is just get decent tyres on a DTR setup,

declan · C Calum 3 Apr 2020, 19:18

@Calum I don’t think he will listen to us lol

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Rear wheel