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Post by andygraham on Oct 30, 2011 21:50:58 GMT 1
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Post by andygraham on Oct 30, 2011 22:34:54 GMT 1
yours looks nicer out of the garage ;0
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Post by JonW on Oct 30, 2011 22:39:15 GMT 1
Very nice indeed!
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Post by mellow on Oct 30, 2011 22:59:23 GMT 1
not again butch   |
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Post by stanlc7189 on Oct 31, 2011 19:13:30 GMT 1
Is "crank breaking" a common problem on LCs 'coz they are now 30 years old? I never had a problem with my original one in 1981. I rode it everywhere and even toured two-up down to what was then Yugoslavia - and it never missed a beat! I re-built my current LC after the crank broke and I'm now scared to go anywhere on it other than within a 20-mile radius of home. Got no confidence in it at all and everytime I open it up into the power band I'm thinking " is it now when it goes bang again?" Not good!
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Post by mellow on Oct 31, 2011 19:57:39 GMT 1
oh i see nice phone ;D |
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Post by andygraham on Oct 31, 2011 20:13:14 GMT 1
sent you the photos months ago!
i think you were too embarrassed to put them on here
;0
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Post by barbarossa on Oct 31, 2011 22:41:53 GMT 1
I'm beginning to wonder if these high-performance 2-strokes are all they are cracked up to be.
I've had 2 Suzukis die on me due to oil-pump failure and my RZ is also " hors de combat " due to a broken oil pump cable. And as much as I love riding my 916-lookalike Cagiva Mito Evo, I always have that nagging worry about seizure and consequently always "cover" the clutch lever with my left hand.
Or is it just 2-strokes with oil-injection that cause trouble ?
I've had all kinds of machines running on pre-mix since I started biking in 1967 and I have NEVER had a seizure or even a "nip-up" on any machine running premix. I even went touring in Europe two-up + tents + luggage in 1970 on a 150cc Lambretta and never had a moments trouble.
I wonder if the oil delivery on injection engines is compromised ? If the oil pump is on the off-side, as per my RZ , then the nearside cylinder will not get oil as efficiently as the off-side. I believe this is evidenced by the fact that when I did a compression test, after I realised that the engine had failed due to oil starvation, the offside cylinder ( nearest the pump ) registered 80psi and the nearside cylinder ( one furthest away from the pump ) registered 60psi - a difference of some 25%. Less oil = more damage is what I mean.
The Cagiva injects oil directly into the crankcase, which seems a far better system than on the RZ/RD, where the oil is injected into the carbs, which seems a tortuous path - the distance from the pump to the nearside carb on the RX must be at least 15". And if you've ever had the pump disconnected with the engine running ( on premix of course ) , you'd see the oil flow is hardly inspiring.
And what about oil supply when accelerating ? Surely there must be a lag from opening the throttle(s) till the oil supply catches up with the engine speed. Like turbo-lag on a turbocharged engine. If this is the case, then the engine will be spinning, if only for a few hundred rpm, with inadequate oil supply.
I really do wonder if a 2-stroke oil-pump is really up to the job of supplying enough oil at high rpm - after all, all competition 2-strokes run on premix and despite running at the sort of speeds and rpm never encountered on a road bike, there never seems to be a constant stream of seized machines.
2-stroke machines are almost historical vehicles now, but I wonder if a better oil-delivery system would have been an ELECTRIC oil pump to deliver the 2-stroke oil. If this pump had a seperate electric motor with a throttle position sensor, then maybe sufficient oil would have been delievered at all rpm as any throttle opening would have been sensed by the pump immediately with no lag as with a mechanical pump.
Or maybe the two-stroke is compromised in any form due to it's total-loss lubrication system and seizures and blow-ups will always occur if the engine is used at more than about 80% throttle opening.
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Post by Norbo on Nov 2, 2011 10:50:51 GMT 1
EXcelent I bet you had heads turning all over the place .
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Post by mellow on Nov 2, 2011 16:28:53 GMT 1
Only if their bikes actually make it there ;D  |
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Post by ianboom on Nov 5, 2011 11:21:05 GMT 1
You're opening a can of worms again if you start the with or without oil pump arguement again!!!
I'm sure it's psychological-when you bike breaks down, it keeps doing it! I had a tuned 250 in the 80's and that was always holing pistons and having crank failures-but that may have been down to my own ignorance and shallow pockets!?
Built my current valve 6 years ago, everything was new and it's been run on Rock oil.
I haven't done 5000 miles in that time, but it still has the honing marks on the bores!
It's now making 67bhp, so we'll see how reliable it is!
I run premix!!
Ianboom.
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