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April 7th, 2018, 12:53 AM   #51
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Well, that went down like a lead balloon.

Elation and fear is a strange combination but the fear should eventually reside Leaving only the elation! Is that how it works?

Apologies Jon for raining on your parade.

663cc with a ported head. Cam I don’t know. Not fussed to ask hence price. I get a spare complete head, spare 104mm piston kit, ECU from memory?

Motor with 19hrs since rebuild, kit with 1 hr.

That leaves a cam and throttle body left for upgrades I’d say.

Last edited by Alan; April 7th, 2018 at 12:58 AM.
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April 7th, 2018, 07:16 AM   #52
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You got a very good deal!

And you are not raining on my parade, you just remind me of the benefits as a single
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April 19th, 2018, 05:05 AM   #53
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My 663 from Norway hasn’t started its journey across to Australia as yet. Having troubles getting the shipping company to respond.

Ola is including a cyl head, 17 hr old barrel and piston kit.
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May 2nd, 2018, 03:48 PM   #54
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The 663cc motor hasn’t left Norway still. It’s an ongoing process but that’s fine. The worst part is I keep purchasing more parts from Ola. I’m buying a crank that has been balanced to suit the 610 piston kit. The Thumperracing crank is unused. The 663 motor was being supplied with a spare 610 piston kit so these will go in another 570 bike I just bought that has a blown crank and cyl.
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May 2nd, 2018, 10:09 PM   #55
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Question for the knowledgeable- the standard 570 cyl taken out to 104mm. Any dramas with this? I suppose they have done plenty like this. I have a cyl that needs an overbore.
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May 3rd, 2018, 12:02 AM   #56
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From what I understand you can go to 102, after that it needs a new sleeve pressed in and the engine blocks machined.
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May 3rd, 2018, 02:02 AM   #57
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Originally Posted by jon andersson View Post
From what I understand you can go to 102, after that it needs a new sleeve pressed in and the engine blocks machined.
Yeah ok, thanks Jon. So be it.

Thumperracing said that their barrel is more suited to extreme use where a taken out standard cyl is ok for your general use. So would it be a correct assumption that all the ‘general use’ cyl’s are sleeved? Or is this a later ‘upgrade’?

Al.
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May 3rd, 2018, 02:26 AM   #58
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Forget that silly question Jon. Had I thought about it a little more I would have answered my own question. Boring the cases out is indicative of a sleeve being fitted.
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May 3rd, 2018, 04:31 AM   #59
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Just to disambiguate if needed:

As far as I understood mr. berglsmerg who has an awesome 104mm-cylinder 610cc "570", the modification that the engine cases need to take a 104mm cylinder is minor and can be done "at home" with a dremel. Just some small protrusions that the wider 104mm sleeve hits.

I was under the impression that both 102mm and 104mm involved a re-sleeve of the cylinder "block" (the crafted metal unit which defines the coolant passages and holds the sleeve).

I'm also under the impression that the stock OEM cylinder block can and will take the 104mm sleeve.

I'm not sure whether the cylinder block requires machining or not for 102 or 104.

I have held the belief that the stock OEM sleeve can not be bored out due to nikasil coating issues.

If this helps? Hope I'm not causing confusion by saying incorrect stuff!
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May 3rd, 2018, 10:06 AM   #60
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An aluminium cylinder nicasil treated can be bored out to have an iron liner no problem, have had it done many times on my ducati engines. You may want to be picky about who does the job as if its not done right the liner will sink :/
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