Rebore

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MK
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Re: Rebore

#16 Post by MK » Thu Aug 10, 2017 12:18 pm

Nope.
Bought +2.5 Woessner as the last common size and it wasn't enough to compensate the old bore misalignment.
So I got +3.25 Woessners for Banshee big bore kits and the were sufficient. As I said it was a very tight fit and took a skilled mechanic to do the bore/hone job.

Btw: still have the unused +2.5 set of Woessners for sale. Make a sensible offer and they can be yours soon ;-)
Bye
Martin

Headcoats
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Re: Rebore

#17 Post by Headcoats » Thu Aug 10, 2017 12:58 pm

Fair play
Did you have to trim the power valves too ?
Cryin' In The Beer Of A Drunk Man

MK
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Re: Rebore

#18 Post by MK » Thu Aug 10, 2017 1:33 pm

Sure. That's another piece in the puzzle that leads to the point of no return :-)
Bye
Martin

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Re: Rebore

#19 Post by Headcoats » Thu Aug 10, 2017 2:03 pm

Have you any pictures of this mighty engineering :smt035
Cryin' In The Beer Of A Drunk Man

(F5)
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Re: Rebore

#20 Post by (F5) » Thu Aug 10, 2017 4:19 pm

US chrome can plate steel bores. Its a bit expensive but not really. My racing 50 lasted 10 years of 13,000+ rpm before the bore became too oval to make full power again.
First crowd who did it plating fell off. Its not as easy as plating ally.
496 Cheetah. TSS PVs, PWK35s, Ignitech, RGV(ish) chassis

Headcoats
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Re: Rebore

#21 Post by Headcoats » Sat Aug 12, 2017 6:03 pm

Still waiting for the phone call to see if the 1.75mm bore was a success !
Too scared to ring myself LOL
Cryin' In The Beer Of A Drunk Man

Headcoats
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Re: Rebore

#22 Post by Headcoats » Wed Aug 16, 2017 4:56 pm

They rang today to say my barrels were done at 1.75mm rebore :smt012
So that's 3 rebore sizes up from when I first took my barrels in to be done :smt021

Out of interest . what CC are my barrels now ?
Cryin' In The Beer Of A Drunk Man

waltmil
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Re: Rebore

#23 Post by waltmil » Thu Aug 17, 2017 4:38 am

It comes out to 366.7, an increase of 5.6%.
Red/White US '84, Spec II pipes, Y-boot w/K&N, Fox Shock, Mikuni carbs?

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Re: Rebore

#24 Post by Headcoats » Thu Aug 17, 2017 9:54 am

Thanks for that

Just tell myself I have a big bore kit now just to cheer myself up !
Cryin' In The Beer Of A Drunk Man

MK
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Re: Rebore

#25 Post by MK » Thu Aug 17, 2017 2:50 pm

Headcoats wrote:Have you any pictures of this mighty engineering :smt035
Like this ?
IMG_8411.JPG
IMG_8411.JPG (48.67 KiB) Viewed 4333 times
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Martin

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Re: Rebore

#26 Post by Headcoats » Wed Sep 06, 2017 4:46 am

Looking at some 400cc (392cc) Banshee type barrels and was looking at the Athena top end kit but was told the quality isn't great
Anyone had one of these kits ?
Other folks mentioned "Serval" but I know nothing about these so if anyone could shed some light on this please ?
Cryin' In The Beer Of A Drunk Man

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two-stroke-brit
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Re: Rebore

#27 Post by two-stroke-brit » Wed Sep 06, 2017 8:10 am

Headcoats wrote:Looking at some 400cc (392cc) Banshee type barrels and was looking at the Athena top end kit but was told the quality isn't great
Anyone had one of these kits ?
Other folks mentioned "Serval" but I know nothing about these so if anyone could shed some light on this please ?
i have an Athena 392 bore and head on my hybrid .
i have not done a lot of miles on it because waiting on a set of TSA pipes.
i have a Spec11 pipes currently fitted and it goes as expected.
HTH Mark
350LC,Athena 392 big bore,stock porting,swiss cheese air box,stock reeds,spec11 pipes.(now TSA big bore pipes)
She might not be pretty but she will always be a fun ride


1982 YAMA RD350LC
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Headcoats
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Re: Rebore

#28 Post by Headcoats » Fri Sep 08, 2017 5:27 am

What are these "bungs" that have to go in the cylinders to make water tight ?
Are they problematic ?
Did you keep the pistons that came with the kit and what did you do about the wrong positioned coolant pipe on the Athena head ?
Cryin' In The Beer Of A Drunk Man

Headcoats
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Re: Rebore

#29 Post by Headcoats » Fri Oct 06, 2017 4:17 pm

Finally got the barrels back today with the fresh bore and 1.75mm pistons !
Looking at the remaining liner, there is about a 2mm thickness left , if that is even, I suspect not
Cryin' In The Beer Of A Drunk Man

Headcoats
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Re: Rebore

#30 Post by Headcoats » Sun Oct 08, 2017 8:13 am

Image 1.75[/url]

Well I picked them up at last !
Cryin' In The Beer Of A Drunk Man

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