RD350LC/TZR

[icarus001]

Bored yesterday so decided to start putting the TZR running gear into my LC.
TZR250 2ma forks, mudguard and yokes (with an LC stem pressed in), upside down 2ma clip-ons, TZR125RR wheels, standard clocks with a farbricated bracket tapped into the top yoke, converted to 520 chain and sprockets to make it easier to line up - had to put a spacer behind the front sprocket to space it off a few mm, running 15/41 renthal sprockets so it should be lively, chain and sprockets left over from motocross racing, so it will need new ones once I know its all ok.

Rear master cylinder off a 2001 R1, bracket from NK and pedal modified by NK.

It looks really straight forward and it is I suppose, there is no rocket science in there but its time consuming, having all the gear needed to fabricate brackets and a decent selection of bolts and bits and pieces is essential too. Took me about 5hrs to get to this point....including lots of brews and cursing when things didn't line up.

I'm waiting for the brakes back from being refinished so no brakes on it yet, and the pipes are off at the moment too so I can put my motocross stand under it and raise it up to work on. Calipers will be refinished in satin black.

As it stands I've lost about an inch of height at the back and about an inch and a half at the front. Obviously I can mess about with that though.
Needs cosmetic work to tidy it up, paint and new tyres, probably Pirelli Diablo Rosso II (110/70 & 140/70).

Few little bits and pieces to work out yet, not sure how I'm going to fit a torque arm, probably a short one with a welded bracket onto the swingarm. Needs a new 39mm steering damper fork bracket.
Then just mess about with geometry.

[icarus001]

The TZR125RR wheels are 8.6kg lighter than the LC ones.
Surprisingly the 2ma forks weigh the same as the LC ones.

I've saved a little with the 520 chain and ultra-light sprockets, so all in all I'm hoping for 10kg, which isn't bad considering most of it is unsprung.

[flames]

i cut the bottom shock mount off my swingarm and welded some thick metal plate between it and the swingarm.i added about 35 mm in total.this raised the back end by about 70mm.this is maybe a little too much as the chain touches the pipes when its on the sidestand.but because of the raised height,it is nearly on its side on the stand.front end deffo feels more planted tho.

[jazzykecks]

I like the balanced look of that !! More pics please as you go....

[jon]

I'm glad you stuck at it, looks good so far.

Need to sort rear caliper bracket, and it's all downhill from there.

[loudpipes]

Looks good will be watching this thread, great work.

[icarus001]

Not so far off now, its back on the road and pretty good, although it needs some engine work, the clutch is slipping a bit.
The plans now are to enjoy it for the rest of the summer then pull it all to bits over winter and put it back together after getting the frame powder coated, the engine rebuilt, Nitron shock, forks need new springs and oil, new paint all round and TSA pipes.

Its got 15/41 gearing so accelerates well, I had it on the dyno and its giving a fraction under 40bhp, so there is some room for improvement.
The light wheels have made a big difference but the forks are weeping oil and the rear shock is buggered, so whilst it still handles well its not as good as it could be.

It feels very different with the new wheels on, its not really an LC anymore, it feels a lot lighter and flighty.

I had to make a spacer for the front wheel and I needed to space the rear over a bit as well so the sprocket nuts don't foul the swingarm, the rear is very tight to get in and I still need to make a proper sized spacer rather than using a washer. And because its opened the swingarm out a bit the rear spindle is about 5mm too short now, so I can't get the split pin through, so I'll have to make a new spindle.

[bare]

interesting re the wheel weights.
How much do those smaller but much wider tyres weigh .. in comparison to an ubiquitous pair of skinny 18" BT45's?
Just wondering just how much of the known heavy LC wheels are offset by their light tyres??

[steve h]

Interesting question bare

[copper99]

Wee problems aside, thats a beautiful bike mate..

[icarus001]

Aug 17, 2013 5:34:12 GMT 1 bare said:

interesting re the wheel weights.
How much do those smaller but much wider tyres weigh .. in comparison to an ubiquitous pair of skinny 18" BT45's?
Just wondering just how much of the known heavy LC wheels are offset by their light tyres??

The old style tyres weigh a lot more than the new stuff, I have a set of 18" Roadriders in the garage and they weigh more than the Pirelli Diablos.
Its because of the materials they use in the construction of the newer 17" wheels, so despite appearing like there is a lot more tyre there the new 17" tyres are actually lighter.
I didn't weigh them but I reckon at least half a kilo.