Boring

D

dps650rider

XS650 Addict
Messages
398
Reaction score
391
Points
63
Location
Pennsylvania
Need to get a set of cylinders bored. Last year I got prices of 40 and 80 a hole from a couple shops. I just got a price from another shop that has new machinery of 375 for 2 holes. I'm curious what others are seeing for the going rates.
 
Sorry, I don't have comparable info for you, but I'm curious as to what their new machinery is (brand system).
 
dps650rider said:
Need to get a set of cylinders bored. Last year I got prices of 40 and 80 a hole from a couple shops. I just got a price from another shop that has new machinery of 375 for 2 holes. I'm curious what others are seeing for the going rates.
Click to expand...

Probably not all that helpful but I can give you prices for what I paid in the UK from an esteemed establishment with motorsport pedigree (I realise you pay for that though).

It cost me £400.00 to have new liners installed and bored.

Daniel.
 
Last edited:
I would go with the 40 (price in my area) per hole. 375 for two holes is ridiculous!
 
jpdevol said:
Sorry, I don't have comparable info for you, but I'm curious as to what their new machinery is (brand system).
Click to expand...

He told me on the phone but I don't remember.

I couldn't believe when he gave me that price. This shop has a good reputation but that is a lot of money. The 40 price was from an automotive shop with old equipment. I have heard that new is better but I can't believe the price difference. To be fair the 40 and 80 quotes are from last year and likely higher now.
 
Last edited:
Do a search on eBay for 'motorcycle cylinder boring.'

I saw someone offering boring services for a very reasonable rate a month or two ago.
 
Just cost me £170 to have mine bored and skimmed, didn't mind paying that as the bores were very pitted so they said they could offset the bore slightly, saved me a lot of money as if they couldn't I would have needed new pistons.
 
Jim said:
Do a search on eBay for 'motorcycle cylinder boring.'

I saw someone offering boring services for a very reasonable rate a month or two ago.
Click to expand...
Yep, there was a guy that had a Serv-Equip boring bar and finished with a Sunnen hone - all the right tools IMO - on Ebay that was priced reasonable. That machine, new, now costs $11K:yikes:
serv equip (2).png
 
Last edited:
Well depending on how much effort and precision goes in it's even with good tools a tedious job.
I have a boring bar as well as a Mobil hone sunnen Jr type.
Last XT big bore sleeve job i did took me a good 4-5hrs in order to work up to correct interference fit bore to sleeve and then to bore out to correct 0,09mm running tolerance 0,005-0,01 top to bottom bore tolerance and correct 500 plateaufinish.
As long as one doesn't have the most modern last generation nascar type honing equipment i do not trust automatic power honing too much.
So what I want to say even for hobby pursuits it's a job that i wouldn't do below approx 220 per sleeve. (Consider if you err just a hint it's all yours besides that the machinery costs also a good portion of dough)

Kind regards
Christian
 
Last edited:
I looked up the last time I bored to 77.5 mm in 2007. At Boretech it was 290 but that was with the carbide treatment he offered. Don't know how much extra that was. Bore is worn after around 70 k miles so going to 78 mm crusinimage pistons, at least that is the current plan.
 
A local guy I'm helping just had his bored for the Cruzinimage .5mm pistons, cost him about $220. This was at a long time little speed shop in town here.
 
A few years back after getting a set of Cruzing Image .5mm oversize pistons, I found a shop with new equipment and they quoted $100 a hole.
 
The last 3 top end engine jobs I have done , the cost of the bore/hone work was $150 . I use pistons/rings from cruzingimage and have a small local shop do the machine work. Sometimes it takes a little while but the work is always done right and the price is very reasonable.......


tim
 
Last edited:
Talked to a guy at another shop and he said he could hone it from 77.5 mm to 78 mm. Don't really like the sound of that, I would think if it were out of round or tapered those issues would remain.
 
No somewhat the opposite, as 0,5 is pretty much the limit where it's almost better to hone as you could only bore another 0,4mm (have to leave some for the honing finish) making good chances that the boring bar will not get enough cutting feed to go through the glazed surface and thus the cut might be somewhat flimsy.
At just 0,5mm missing it's almost better to hone the remainder as the hone has a tendency if applied correctly to even out differences in parallelism and diameter.

Kind regards

Christian
 
Perhaps tooling has changed/improved, but "back-in-the day" hones (Sunnen, Aamco, etc.) were good for final sizing and finishing; perhaps removing .05mm or so. Boring bars (carbide bits) would need several passes to remove 0.5mm. (2 oversizes). I wouldn't think the hones - that I'm familiar with - would be well suited to remove .5mm and get a round, straight bore.

If that local shop says it can hone .5mm, I'd want to see the equipment. If it's handheld (even diamond stoned), I'd decline.
 

Similar threads

I
Master cylinder bore clean up, plastic reservoir removal?
Replies
18
Views
626
Its been a long time
I
motormike
Sellers remorse (insert sad face here)
Replies
15
Views
451
Kevin Werner
Kevin Werner
T
XS2 fork mysteries, need help
Replies
13
Views
244
GLJ
GLJ
toglhot
Hydraulic clutch build.
Replies
9
Views
459
650Skull
650Skull
B
Starter help please
Replies
1
Views
95
Jan_P
J
Back
Top