Trials Australia Forums

The KT250, RL250 and Cota 348 flywheels would be poor choices.
I fitted a standard 350 Alpina flywheel to my 350 Alpina recently, replacing the much lighter flywheel that the bike came with and the standard flywheel made the motor much nicer to ride with.
I think I can see a standard size flywheel in your photo but not sure of it is the aluminium version or the zinc version. The zinc version would be the right one

Let us know what model Alpina that one is. I know the later Alpinas all had Motoplat ignitions on them. Both the M212 and the M213 had Motoplat on them. Either will fit though. Motoplat or Femsa. The 350`s all had a much heavier flywheel on them though.

Hi Everyone,

David Lahey wrote:The KT250, RL250 and Cota 348 flywheels would be poor choices.

Congratulations David, you have found some of the

Bully fanatic wrote:Let us know what model Alpina that one is. I know the later Alpinas all had Motoplat ignitions on them. Both the M212 and the M213 had Motoplat on them. Either will fit though. Motoplat or Femsa. The 350`s all had a much heavier flywheel on them though.

M213 Graham, pretty sure it is original paint late model version of the last model Alpina. It would be good to know how many they made?

I found a couple of photos of my old RL250.
I stripped the Orange off the Alloy Tank and was going to fit it to my James Trials project.
I have no recollection where it went. It may have been loaded in my old Hilux ute to deliver to its new owner?
A well known collector of Twin shocks apparently has quite a few RL's. None with an Alloy fuel tank.

whitehillbilly

Hi Everyone,

whitehillbilly wrote:I found a couple of photos of my old RL250.
I stripped the Orange off the Alloy Tank and was going to fit it to my James Trials project.
I have no recollection where it went. It may have been loaded in my old Hilux ute to deliver to its new owner?
A well known collector of Twin shocks apparently has quite a few RL's. None with an Alloy fuel tank.
whitehillbilly

The years and memory can play tricks, if it happened in that order Shane., the photos on your Hilux were earlier. The reason I say that is I can see orange on the tank in your photo:

Considering yours had an aloooominium tank, it must have been an early model and it did not have a hand grenade type silencer:

So I am thinking later in 1974 because of hand shaped muffler,

One of mine has the hand grenade silencer however the sticker on the frame is removed. Who knows it may have had an aloooominium tank and replaced under warranty as that happened apparently?
There is an extra in my shed at the moment but not mine:




In other news the Freddy Mercury (lots of teeth) sprocket has turned up thankyou David. The bore was fine as not critical and the PCD for mounting bolts was perfect, however there was a 0.5 mm interference fit on the spigot. 520 62 T is too big to spin in my lathe (no gap bed) so I did the old spin the wheel and angle grinder trick on the hub:

That rear sprocket looks amazing Greg. Have you had a test ride yet to see what first gear is like?
Is that the same Alpina you rode at Conondale years ago?

what do size is the front sprocket?
Guy

Hi Everyone,
From bottom to top as that is how I do things.....

Guy53 wrote:what do size is the front sprocket?
Guy

13T on the front Guy, that is the biggest that will fit as the chain only just clears kickstart shaft. It is a pet hate of mine how the chain always rubs on the swingarm at the pivot. With this set-up I can fit my traffic signal finger in the gap!

David Lahey wrote:That rear sprocket looks amazing Greg. Have you had a test ride yet to see what first gear is like?
Is that the same Alpina you rode at Conondale years ago?

David, the M213 I rode at Conondale was BLUE and much more Trialised with a custom 10T and 50T:


With guidance from you and Graham I have been able to refine my aim in the Skill tester crane:


They say a poor tradesman blames the tool so I have spent many hours practising and it seems there is more than gravity at play.
The @$%#£;'%=/ grabber won't even move a flywheel so I am now thinking this might be a good modification:

Here are the results so far: