Author Topic: Nikasil V re sleeve?  (Read 13565 times)

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Offline Nathan S

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Re: Nikasil V re sleeve?
« Reply #15 on: November 10, 2014, 09:04:03 pm »

The sleeve in my 85 and 86 Husky's and 69 and 76 Ts Suzuki's look to be satisfactory and have done exactly what they were designed for for a  very very long time.

If you want to use that logic then where are all the early chrome bore Kawasaki's ?

 ;)

A couple of points:
1. Both those bikes were designed to have sleeves. The barrel was probably cast around the sleeve, ensuring far better heat transfer than any pressed-in sleeve.
2. Your Swedish bikes probably have an exceptionally good quality bore in them. Your Japanese commuter bikes have been saved by the fact that they make virtually no HP.
3. Kawasaki's Electrofusion bores were often needlessly replaced. They look like crap fairly early in their lives, but are still entirely servicable - and far too many mechanics (both amateur and professional) assumed they were buggered when they were actually about 10% of the way through their useful lifespans.

I'm done with steel bores. They wear out too fast, they cost too much money to rebore, and too many piston oversizes are hard to get. They may be more forgiving of sezures and dust-munching, but its been a while since I was stupid enough to let either of those things happen.

On the topic of oversizes, be aware that plenty of sleeves are offered with only two oversizes of piston, so it's not like the old days where you'd get stock, +0.25, +0.50, +0.75, +1.00, +1.50 and +2.00mm (and maybe +1.25mm and +1.75mm) oversize pistons...
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Offline Lozza

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Re: Nikasil V re sleeve?
« Reply #16 on: November 10, 2014, 10:40:40 pm »
If you want to use that logic then where are all the early chrome bore Kawasaki's ?

They just got replated and now run on nicasil same as the early TA/TZ yamaha's. Porsche must have got it all wrong using nicasil on their air cooled 917 race cars and 911 road cars,maybe Ferrari did to for their F1 and road cars?

How long between rebuilds on that Ferrari F1 engine ?

I don't see any relevance to the debate but FYI last years V8 engines did 2500-3000 km between service intervals similar to MotoGP engines. That is being used by the the best drivers and riders on the planet.
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Offline 2stroksmoka

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Re: Nikasil V re sleeve?
« Reply #17 on: November 10, 2014, 11:09:47 pm »
I am looking at Electrosil for my 89 cr125, I got quoted $440. What brand piston is the best if OEM isn't available? Wossner seems to be the popular choice on these forums from what I have read

Offline William Doe

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Re: Nikasil V re sleeve?
« Reply #18 on: November 11, 2014, 06:37:04 am »
If cast iron sleeves are so good why don't they fit them ex factory any more  :-\

Price/profit ? Laziness ?  No tradesmen left who know how to do it ?

The sleeve in my 85 and 86 Husky's and 69 and 76 Ts Suzuki's look to be satisfactory and have done exactly what they were designed for for a  very very long time.

If you want to use that logic then where are all the early chrome bore Kawasaki's ?

 ;)

76 TS 250 has a plated Cylinder ex factory  ;)
Its only old bike racing FFS get over yourselves





The Artist formerly known as TM Bill

Offline sleepy

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Re: Nikasil V re sleeve?
« Reply #19 on: November 11, 2014, 10:34:01 am »
I am looking at Electrosil for my 89 cr125, I got quoted $440. What brand piston is the best if OEM isn't available? Wossner seems to be the popular choice on these forums from what I have read
Wossners are good. An other choice is ProX they are a cast piston very similar to the OEM and are avialable in 5 different stock bore sizes, 66.34 up to 66.38.

Offline sleepy

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Re: Nikasil V re sleeve?
« Reply #20 on: November 11, 2014, 10:39:17 am »
I can see what needs to be done here.
We will have to tell all the guy's with sleeved plated cylinders to STOP winning races and an even bigger rap on the knuckles if they win a Title cause the guy's on the forum don't like it. :) :) :) :) :) :) :) :)

Offline William Doe

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Re: Nikasil V re sleeve?
« Reply #21 on: November 11, 2014, 02:50:16 pm »
I can see what needs to be done here.
We will have to tell all the guy's with sleeved plated cylinders to STOP winning races and an even bigger rap on the knuckles if they win a Title cause the guy's on the forum don't like it. :) :) :) :) :) :) :) :)

You stick to your dinosaur engineering mate  ;) we will keep winning races and enjoying the time we don't have to spend pissing around in the shed making do with half arsed bodge ups  ;)
Its only old bike racing FFS get over yourselves





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Offline sa63

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Re: Nikasil V re sleeve?
« Reply #22 on: November 11, 2014, 03:25:42 pm »
I sent a barrel to the uk for conversion to nikasil, was cheaper than using the mob in Mel. they want $500 ish to electro plate  a worn steel bore 93mm.. I got the job done in the uk with a new alloy sleeve + nikasil  for about $280. exchange rate was kinder about a year ago though, but I thought  the cost in Mel. was O.T.T. Also I did have a mate going over there (free post..)
« Last Edit: November 11, 2014, 03:30:47 pm by sa63 »