A Modern Road Legal 2 Stroke

[Le_Fromage_Grande]

What survives sidecar racing? That's usually an indicator of a tough motor.

Nothing, but they used to like EXUP engines for sidecar grass track

[Bigjawa]

What survives sidecar racing? That's usually an indicator of a tough motor.

Nothing, but they used to like EXUP engines for sidecar grass track

EXUP engines are a hell of a lot lighter than an 1100R.

[mangocrazy]

Yes, it's always a question of knowing where to stop. When I was restoring the LC the OE shock had to go and was replaced with a YSS jobbie. It works well. I was in two minds about the forks and went down the route of 'keep it standard, but upgrade the internals' and fitted YSS emulators and fork springs. But of course they are still ridiculously spindly 32mm items that flex in a strong breeze. And I'll very soon be fitting a set of Brembo calipers to them, which should really tie them in knots...

Understand about the wheels. They are insanely heavy. But they're iconic and partially define the bike. Why can't someone produce a set of visually identical forged aluminium replicas with half the weight? Take my money...!

So I don't know what to do. I think I'll just accept all its manifest limitations and ride it in a (blue) haze of nostalgia...

[Le_Fromage_Grande]

I think YBR125 wheels aren't a million miles off LC ones, you'd even get to keep the drum rear brake.

[Le_Fromage_Grande]

You're into the whole "LC or YPVS, which is better" debate, I personally prefer the YPVS as the engine is smoother and the bike handles a lot better, also my YPVS was a lot more reliable than the 3 LCs I had.

If I were to buy another LC it would be a 250 as I thought they were crisper to ride than the 350s and not much slower.

[mangocrazy]

I've owned both and I appreciated them both for what they were. I've always tinkered and upgraded every bike I've ever owned an the LC was no exception, but before I mothballed it 25 years ago I put it back to standard and sold off all the trick bits. So now I have a largely standard LC and I think that's the way it will stay (apart from the Brembo calipers I intend to fit).

Funnily enough I never upgraded any of the bits on the YPVS I owned, probably because it was so much of an 'improvement' in every way over the LC. I really do regret selling it.

[Le_Fromage_Grande]

The YPVS and ultimately the F2 is a better bike in almost every measurable way.

My N1 handled better, was faster, more responsive, etc, than my LC, but I sold it because I always wanted to ride the LC and only took the N1 out because I felt guilty about not using it at all.

I didn't think much of the F2 I rode, it felt slower than the LC2 I had at the time, but it's over 30 years ago and could have been a duff F2, I rode several LC2s and they all felt a little different to each other, so the same is going to be true of F2s.

[Jody]

I take it they're banking on these things not being ridden much? Basically they've taken a highly tuned 250 and used modern electronics to make it rideable. I'd be surprised if one that was ridden hard, actually made it to 1800 miles without blowing itself sky high. Has anyone actually independently dynoed one?

And it doesn't look anywhere as nice as an RGV or NSR250.

An old GSXR1100 makes a genuine 115 to 125 rwhp standard. And will do it for 100k I wonder how many of the 200bhp 1000s will have all their horses if they make it that far.

Considering the tiny tiny tiny percentage of those type engines built that will ever see 40,000 miles. I'd not be surprised if 100,000 miles is of any concern whatsoever to manufacturers ! ?

[Jody]

Considering the tiny tiny tiny percentage of those type engines built that will ever see 40,000 miles. I'd not be surprised if 100,000 miles is of any concern whatsoever to manufacturers ! ?

IME of manufacturing in the last couple of decades, the calculations have got so good now that things can be designed to just about last for the warranty period, if it means they can be made cheaper than something that would last for longer.

That being said, materials technology has also improved to the point that things last longer than they used to and it doesn't necessarily cost more, so it might be that these new two strokes will be more reliable than older ones.

On a similar note, the 'running in' of an engine, is it still necessary? Are tolerances so small with modern manufacturing, that parts don't need to bed to each other?