Costly rebore..

[A100man]

HI All

I have an XJ550 engine lying about that I was going to refresh with XJ600 pistons and head - to do this requires the bores widening from 57 - 58.5 mm which i think the liners can handle OK. I have the pistons but the rebore quotes form the local works are 50 quid (inc VAT) per pot.

This seems dear to me - am I out of touch? If I am the project probably isn't worth it.
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[ThatDippyTwat]

My work paid 600 quid for a 3" machined cube with one 1/2" hole in it 2 days ago. We have our own huge machine shop, but it would cost us more in not running normal work than to farm it out to next-door.

£50 a pot is cheap, setup time per-pot isn't something you write off or ignore, and you'll need at least 2 passes down the bore, machine and confidence dependant. Add to that verification of the job being done properly afterwards. It all adds up in time, and machinists rates are high.
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'98 VFR800 (touring) - '12 VFR800 Crosrunner (Commuting) - '01 KDX220 (Big Green Antisocial Machine)

[MCN]

Break it down:

Time to set up in a machine.
Time to machine.
Time to Clean up.
The engineers is a business for profit not a charity.
£50/pot seems OK to me.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[redeem ouzzer]

Is that £50 for a good rebore or £50 for a shit one? You need to be asking questions about clearances and suchlike.
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Be a REAL MAN!

[Rogerborg]

Have you asked Tef to do a rebore for you in 1978 where he lives? It's sure to be cheaper, but you'll need to specify it in thous.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[MCN]

[Nobby the Bastard]

They used to be £10 a bore back in the very late 80s, very early 90s, but bearing in mind that there's probably only one place in the country that can still do them now, £50 seems reasonable.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[A100man]

Fair enough.. I can take that on board.

Like most things these days the economics of repair become marginal..

Cheers
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[Polarbear]

[Nobby the Bastard]

[A100man]

It's also part psychological,. I recently picked up a 'spares' FZ750 with two motors rolling gear and other spares for less than 150 and so while it is greatly satisfying to rebuild a motor the cold hard facts don't often stack up (200 quid for a set of XJ pistons rings for example).

In the aircooled VW world things are different - a rustbucket MOT failure T2 van will cost 1000s still and yet you can get a complete set of new barrels, pistons rings etc.. for about 200 I guess due to the abundant world demand still.
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[-]

Ebay shows a few barrels for XJ600's at under £30 posted, one at under £25.

Are they too new? (1992-2003)

https://www.ebay.co.uk/itm/YAMAHA-XJ600-XJ-600-XJ6-N-F-1992-2003-CYLINDER-BORE-BARRELS-/201988184090?hash=item2f076f181a:g:TzUAAOSwsXVZacdv
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[A100man]