Author Topic: Cylinder Re-Sleeving  (Read 558 times)

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Offline Batman

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Cylinder Re-Sleeving
« on: July 10, 2018, 10:58:42 AM »
Hello All,  first of all great rally pictures, congrats to members who made it and envy to others who didn't :) I have been there once, probably will join in future, thinking of importing my stock Rajdoot from India to showoff in future rallys  :D

Anyway, question for people who have experienced re-Sleeving. Is it worth the effort and money? Suppose Chinese stuff is now cheaper, wondering which route to take? any recommendation who could re sleeve? probably this has been discussed till death in past but no harm is seeking fresh advice.
1974 RD350A (US Imp)
1989 Escorts Yamaha Rajdoot 350 (HT)
Triumph Thunderbird, YZF R6, 1972 HD XLCH 1000 Sportster, GSX1300R Hayabusa.

Offline 5port

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Re: Cylinder Re-Sleeving
« Reply #1 on: July 10, 2018, 01:41:57 PM »
Great result with 2R9 cylinders done for my 400E by PJME.  ;)

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Offline betty foRD

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Re: Cylinder Re-Sleeving
« Reply #2 on: July 10, 2018, 07:37:32 PM »
 Resleeve makes sense for 2R9 as options are zero. For 350 still trickle of good barrels coming from the USA and the Chinese barrels are improving. Just don’t pay eBay type money for them...
Rev 'em till they rattle

Offline Blackhat400

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Re: Cylinder Re-Sleeving
« Reply #3 on: July 10, 2018, 09:32:53 PM »
Great result with 2R9 cylinders done for my 400E by PJME.  ;)

5port
What was  the cost,,? and,  are the  2r9  barrels  interchangable  between models,
i know the porting is different ,do they fit 400c/d  models, ?

Offline ozmadman

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Re: Cylinder Re-Sleeving
« Reply #4 on: July 10, 2018, 09:46:54 PM »
Vito's performance used to do  piston and barrel kits, but just been on their site and now only a crank for a 250/350 ??
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Offline lyonoso

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Re: Cylinder Re-Sleeving
« Reply #5 on: July 10, 2018, 10:12:13 PM »
Great result with 2R9 cylinders done for my 400E by PJME.  ;)

5port
What was  the cost,,? and,  are the  2r9  barrels  interchangable  between models,
i know the porting is different ,do they fit 400c/d  models, ?
I know Pjme can sleeve c/d with e/f sleeves so maybe can do other way round

Offline 5port

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Re: Cylinder Re-Sleeving
« Reply #6 on: July 10, 2018, 10:34:43 PM »
Great result with 2R9 cylinders done for my 400E by PJME.  ;)

5port
What was  the cost,,? and,  are the  2r9  barrels  interchangable  between models,
i know the porting is different ,do they fit 400c/d  models, ?

Best advice....ask PJME!   :)

5port
5port

Offline betty foRD

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Re: Cylinder Re-Sleeving
« Reply #7 on: July 10, 2018, 11:32:17 PM »
Great result with 2R9 cylinders done for my 400E by PJME.  ;)

5port
What was  the cost,,? and,  are the  2r9  barrels  interchangable  between models,
i know the porting is different ,do they fit 400c/d  models, ?

As above , You would need to ask PJME but the answer is almost certainly going to be yes. However 400 C/D barrels are arround and also as with 350 there’s a steady stream coming from the USA so not likely to be particularly cost effective at the moment.
Rev 'em till they rattle

Offline Batman

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Re: Cylinder Re-Sleeving
« Reply #8 on: July 11, 2018, 04:14:45 PM »
Hello All, Thanks for the suggestion. PJME have offered two alternatives, either re-sleeve on the existing or uproot the liner completely and put in a new and lock it in by some method. The only downside is it will cost a lot either ways. The existing sleeved barrel has micro cracks due to some shoddy job in past, hence 2nd option is more likely I will take. I have to get ports right anyway.

Yes, US barrel can be an alternative, but I would like to share some of my wisdom, should you be interested or please skip to the very last paragraph -

I don't want to go US Barrel option as the bike I'm building is in India; it has a different exhaust port height. I have done it once in past and the result was not so pleasant. Indian HT, code 1A1.51 has a unique cyl head and rest of it making it suitable for hot and busy Indian roads. Comparing B2B US Vs 1A1.51, 1A1 delivers much smoother low- low end torque, fuel economy and runs bit cooler, dare I say something like 400. If I do the barrel I may have to get rest of the other bits form US Of A too, bit of a downgrade, and who knows how the exhaust of 1973 compares internally with 1982 1A1 part?! Once I had a chance to compare exhaust in photos, first thing obvious was 1A1 exhaust is more like 400 whereas the 73's exhaust is slight banana shape, it may be due to under chassis foot peg mount clearance requirement, but clearly not a carryover part. Baffles appear to be same but don’t know where separators are and if there is subtle difference in length makes all the difference. Time for cliché -The devil is in the detail :) The other obvious difference is the air filter box, which has a unique intake, making it less restrictive on 1A1. I can go on comparing both bikes, perhaps will leave it for some other time.
Anyhow, I know People in India had been jumping on US band wagon thinking 1973 RD is superior so let’s swap the barrel for some extra power, off course part availability is a major issue, but the fact is Yamaha have developed RD a lot since the launch of original RD in 70's till the launch of 1A1 in 80's. They carried back lessons learned and design clues from 400 & LC into the Indian variant making it ever so slightly superior than the original 73. Off course 400 is the better European cousin, but in Europe we have financial advantage, giving the kind of capital investment needed for the full bodied drama, whereas the Indian RD missed being one of the best air cooled narrowly due to massive cost cut measures by the tight fisted Wiesels in Escorts, who also manage to delete the diks brake to make it affordable in less than 500 quid. Sad I know! but still Indian RD runs better, as design changes were far too much to be taken out by silly cost cutting mo***s. Thanks to the finite tool life and lack of floor space availability in Japan ;D Yams had to use all latest castings and production methods.
 
ok, enough of me sharing wisdom. The point is, whether £400 makes it all worth all the effort.   
« Last Edit: July 11, 2018, 05:54:38 PM by Batman »
1974 RD350A (US Imp)
1989 Escorts Yamaha Rajdoot 350 (HT)
Triumph Thunderbird, YZF R6, 1972 HD XLCH 1000 Sportster, GSX1300R Hayabusa.

Offline iranana

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Re: Cylinder Re-Sleeving
« Reply #9 on: July 11, 2018, 11:54:04 PM »
Just on the topic of Chinese cyls and the Indian RDs - from what I've read all of the Chinese cyls are ported to the Indian RD spec. I know the Chinese cyls are a crapshot, hit and miss kind of deal, and probably require work to get them to a usable standard, but it is potentially another option...

https://www.aliexpress.com/item/Original-Motorcycle-Parts-Original-Moto-64mm-Cylinder-For-YAMAHA-RD350-Supper-Performance-High-Precision/32808736159.html

Aliexpress has a good dispute system that favours the buyer, so if you were thinking of trying it out, I'd use Aliexpress because you're more likely to get a refund if they're crap... but again, hit and miss.

Offline stukey

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Re: Cylinder Re-Sleeving
« Reply #10 on: July 12, 2018, 07:48:24 AM »
They look really good.The quality looks superb .They should be top notch and are very nice and cheap. All the things you could wish for ::) ::) ::)
Rd 350 special can we get more than 70bnp?
Silver-dust 350b now with new owner
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and not forgetting the r6 streefighter
 R1Z 250

Offline Batman

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Re: Cylinder Re-Sleeving
« Reply #11 on: July 12, 2018, 10:38:31 AM »
Thanks Iranana for sharing a source. Ideally we would love to put these Chinese barrels on CMM and also in the materials lab to see how it compares with original, in terms of liner, housing composition and dimensions. Regarding honing cross hatch, I'm sure it doesn't matter that much :D

Port correction shouldn't be an issue as long as its not miles out. The only issue with these unsolicited source is, there is no one to control them so they might change things overnight  :-\

Are we heading towards TKR kind piston and Chinese barrels eventually!  :'(
1974 RD350A (US Imp)
1989 Escorts Yamaha Rajdoot 350 (HT)
Triumph Thunderbird, YZF R6, 1972 HD XLCH 1000 Sportster, GSX1300R Hayabusa.