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Post by mak595 on Dec 28, 2019 18:53:02 GMT 1
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Post by midlifecrisisrd on Dec 28, 2019 19:10:24 GMT 1
Yes but about 40 horse and different exhaust fitting
Its a pity I'd put those cylinders in the same camp as Indian tanks
Steve
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Post by mak595 on Dec 28, 2019 19:12:05 GMT 1
Cheers, that rules them out  |
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Post by Tobyjugs on Dec 28, 2019 19:29:14 GMT 1
Cheers, that rules them out That's what I always thought but I know a Dutchman who is always testing the fake and cheap parts. He's had good results using Chinese barrels with Vertex pistons. The barrels are radically ported and made 73 pk. One big end failed after 5000 km but the good cylinder was still in good condition. |
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Mad Biker
Drag-strip hero
We lead others try and follow.
Posts: 243
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Post by Mad Biker on Dec 28, 2019 22:44:24 GMT 1
we've had a few of these cylinders come in to be tidied up as the casting quality was variable, but you could make them good. One set had to be rebored and the liner was soft. Im not sure if that was just a bad set or if the liners are of variable quality as well.
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Post by Tobyjugs on Dec 28, 2019 23:57:43 GMT 1
I think that's the big unknown with the copy gear, quality control.
I've seen him use lots of different cheap carbs but has ended up with genuine Keihin or Mikuni's for example.
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Post by JonW on Dec 29, 2019 0:42:14 GMT 1
A guy on the RDRZ500 forum got some, as Martin says, they were soft when rebored and Ive read some of the liners were flaky as well.
you get what you pay for...
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Deleted
Deleted Member
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Post by Deleted on Dec 29, 2019 4:28:18 GMT 1
I wonder how they deal with this statement
Feature:
-2 Years Warranty
-100% Brand new and high quality
-Durable and effective top power Chainsaw Motor Cylinder
-Instruction is not included. Professional installation is recommended
-Contact us please for whatever we can help
Good luck trying to claim
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Post by Tobyjugs on Dec 29, 2019 11:03:24 GMT 1
we've had a few of these cylinders come in to be tidied up as the casting quality was variable, but you could make them good. One set had to be rebored and the liner was soft. Im not sure if that was just a bad set or if the liners are of variable quality as well. Hi Martin do you know or anyone else on this forum the hardness of the steel/iron used in these barrels??? |
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Post by jon on Dec 29, 2019 11:59:56 GMT 1
Yes unfortunately you can’t just go about lining cylinders with the old adage ‘any old iron’.
Terry Shepherd designed an aluminium cylinder for lambrettas known as a TS1. It had a nikasil lining. It shared a few design similarities with the YPVS as it used a reed valve assembly the same dimensions as a YPVS but slightly shorter. I have a machined YPVS reed valve in mine actually.
Anyway, I had one heavily tuned using an IT250 piston once. It was bored out and lined with a spheroidal graphite iron liner. This improves the properties such as crack resistant, less likely to flake, good wear resistance etc. suitable for a cylinder.
Jon
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Post by 4l04ever on Dec 29, 2019 14:55:09 GMT 1
The aftermarket Banshee cylinders appear to be hit and miss in terms of quality control. Even the better suppliers get the odd bad set, so luck of the draw if you get a good set or not.
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Post by Tobyjugs on Dec 29, 2019 16:16:39 GMT 1
Pim has built his engine up again so it will be interesting to see how it fares.
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Mad Biker
Drag-strip hero
We lead others try and follow.
Posts: 243
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Post by Mad Biker on Dec 29, 2019 17:41:57 GMT 1
we've had a few of these cylinders come in to be tidied up as the casting quality was variable, but you could make them good. One set had to be rebored and the liner was soft. Im not sure if that was just a bad set or if the liners are of variable quality as well. Hi Martin do you know or anyone else on this forum the hardness of the steel/iron used in these barrels??? Sorry I don't know. |
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Post by bare on Dec 30, 2019 19:44:26 GMT 1
More than fair chance that the liners are of repurposed vintage pipe...Bought for V little.
Almost Zero likelyhood these are were Eutectically cast.. as are/were Yama cyls.
Buy Cheap = Buy twice and if truly Dim.. Repeatedly.
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Post by moonyo on Dec 31, 2019 16:59:30 GMT 1
They are cheap as they are Chinese rubbish,your bike is Japanese quality,why compromise.
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