Aprilia Rs250

[rocket]

its coming out bang in the middle of the block. I tried nipping up the studs and it improved slightly and move along the seem a bit.The crank felt nice and tight one the reason i did not split it.

But thanks for the heads up ill have a read and see whats what before stripping

[rocket]

Ok so the crank seal has a lip on it which means to replace it you have to split the cases.... oh well

[rocket]

Finally got some more done on the rs250.

Dropped the engine out and test fitted the new brakes.

[duke63]

Sweet. Does look good.

Did you have to split the engine again?

[rocket]

Sweet. Does look good.

Did you have to split the engine again?

going to have to yes but not done it yet had loads on over the last few weeks month so only just getting some time back on it

[rocket]

finally got round to taking apart the engine and today started the rebuild. Managed to sneak it in the house so i could work in the warm. Surprisingly the Mrs was fine about it.

[StMarks]

Have you managed to locate the source of crankcase leak yet Rocket.?
Also, I think I'd be tempted to renew all the bearings whilst you're stripping the crank. There will never be a better time, and their life is finite on a 2T anyway.

[Cav]

Definitely change the bearings.. RS's were renowned for heat seizing bearings and spitting riders off at 90+mph

[rocket]

Crank case had been split before. And not sealed correctly. I could see we're it was leaking when I split it.
It's not as simple as changing bearings as they are welded cranks and really need doing by a specialist. So I checked the crank and it's well in the tolerance so it'a gone back together. About 3/4 through putting the engine back together and then I will pressure test it.

[StMarks]

..... I checked the crank and it's well in the tolerance s......

Fair enough mate, if there is no discernible wear on the mains or big ends then it would have been a waste of time & money. Sorry if I was stating the obvious, it's just that bearings used to fail so quickly that I used to replace them & the crank seals almost as a matter of course when a block was split.
But that was usually on singles, and a far more straightforward task. Back then even decent bearings & oil seals together were cheap as chips too.

[rocket]

I have been working on this getting the engine back together. The Mrs Has made me put the engine back in the garage for Christmas .

I have been busy just not much to take pictures of.
I have been collecting bits so i can rewire the bike i moving the loom tot he front of the bike also having some custom parts made up i will take some snaps of them when i get them back.

[DaytonAndy]

Happy Christmas mate. I too have been on strict instructions to remove all tools and motorbike bits from the house!

[Blade]

You and Duke building exotica makes me want to join in

[rocket]

Over Christmas and new year i have been mostly been drawing this.


i figured it would help me understand the wiring better and if i ever needed to look back at a later date it would be easier to work out what I have done.

[Blade]

Your getting as obsessive as me

Top skills

[Deegee]

That looks proper!

Fwiw I've worked with far poorer professionally produced schematics than that on many occasions Rocket.

[duke63]

Are they Pirelli Rosso 3 tyres, rocket?

[rocket]

No there roso 2 's

off the bike now though i have put some Continental super moto tyres on.

[Monty]

You should get some "RStrines 250" stickers made up for this bike, going to be a beast on the back roads.

[rocket]

You should get some "RStrines 250" stickers made up for this bike, going to be a beast on the back roads.

I hope so :-P

Post man has just been sorry its late but Merry Christmas Little bike