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  #1  
Unread 11-29-2017, 02:04 PM
twinturba's Avatar
twinturba twinturba is offline
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Default Top Performance Cast Iron 85cc Kit

Got a few of these to try as a more powerful alternative to the legendary "Rose" kits.

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Current: NCXD, Carlos, Newd, Aprilia RS10k, Max, Bangkok, Derbi ADV

Past: Yuki, Marco, Fumi, '16 & '15 RC390, '11 Madass,'98 Chester, '00 Mito, '12 PW50, KTM BR 65, Aprilia BR50, '06 Aprilia RS125, '04 DRD, 08 WR250X, 7x '03 Derbi SM's, 6x 99-04 Aprilia RS50's, 2x Derbi GPR, '00 Aprilia RS250, '99 Aprilia RS250, '95 Cagiva Mito 125, '04 & '95 NSR50R, '90 Honda NS50, '94 Honda RS125, '90 Honda RS80, '88 YSR63 (1st 2stroke!), '89FZ600, '89KLR250(1st Bike!)

Last edited by Four_Ari : 11-29-2017 at 08:40 PM.
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  #2  
Unread 11-30-2017, 08:29 PM
Rj_666 Rj_666 is offline
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Default Similar kit -

I'm running a 'similar' kit, the Top Performances 'TPR' kit. 50mm piston, stock stroke, for roughly 78cc.
I've always liked the pink / rose kits, but I wanted to try a kit with a bridged exhaust port.

Great video !
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  #3  
Unread 12-01-2017, 04:52 PM
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twinturba twinturba is offline
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That TPR kit is interesting! Can't go wrong with Top Perfomance parts

Thanks for coming back to Bats and checking out our video! I would like to create more video content going forward so any input you have for future videos are appreciated!
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Current: NCXD, Carlos, Newd, Aprilia RS10k, Max, Bangkok, Derbi ADV

Past: Yuki, Marco, Fumi, '16 & '15 RC390, '11 Madass,'98 Chester, '00 Mito, '12 PW50, KTM BR 65, Aprilia BR50, '06 Aprilia RS125, '04 DRD, 08 WR250X, 7x '03 Derbi SM's, 6x 99-04 Aprilia RS50's, 2x Derbi GPR, '00 Aprilia RS250, '99 Aprilia RS250, '95 Cagiva Mito 125, '04 & '95 NSR50R, '90 Honda NS50, '94 Honda RS125, '90 Honda RS80, '88 YSR63 (1st 2stroke!), '89FZ600, '89KLR250(1st Bike!)
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  #4  
Unread 12-28-2017, 01:41 PM
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jkv357 jkv357 is offline
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Still looking for a RS50 for a project...

...but what are the advantages/disadvantages (besides added weight - is it significant?) to the cast iron cylinders over the aluminum ones?

Thanks.
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  #5  
Unread 12-28-2017, 06:00 PM
Rj_666 Rj_666 is offline
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For cast iron, I've always thought that being able to easily hone out the barrel and install a oversize piston / ring was a pretty good thing, as opposed to having to get the aluminum barrel resprayed with Nikasil
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  #6  
Unread 12-29-2017, 06:09 PM
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twinturba twinturba is offline
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Quote:
Originally Posted by Rj_666 View Post
For cast iron, I've always thought that being able to easily hone out the barrel and install a oversize piston / ring was a pretty good thing, as opposed to having to get the aluminum barrel resprayed with Nikasil
Thats for sure an advantage.

We have found that the Cast Iron cylinders last forever. Maybe its less expanding and contracting or maybe its something else, but we have never been able to kill one of the cast iron cylinders!
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Current: NCXD, Carlos, Newd, Aprilia RS10k, Max, Bangkok, Derbi ADV

Past: Yuki, Marco, Fumi, '16 & '15 RC390, '11 Madass,'98 Chester, '00 Mito, '12 PW50, KTM BR 65, Aprilia BR50, '06 Aprilia RS125, '04 DRD, 08 WR250X, 7x '03 Derbi SM's, 6x 99-04 Aprilia RS50's, 2x Derbi GPR, '00 Aprilia RS250, '99 Aprilia RS250, '95 Cagiva Mito 125, '04 & '95 NSR50R, '90 Honda NS50, '94 Honda RS125, '90 Honda RS80, '88 YSR63 (1st 2stroke!), '89FZ600, '89KLR250(1st Bike!)
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  #7  
Unread 12-30-2017, 07:03 AM
stevieboy22 stevieboy22 is offline
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Quote:
Originally Posted by jkv357 View Post
Still looking for a RS50 for a project...

...but what are the advantages/disadvantages (besides added weight - is it significant?) to the cast iron cylinders over the aluminum ones?

Thanks.
What exactly are you looking for in a 'project RS50'?
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  #8  
Unread 12-30-2017, 04:56 PM
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jkv357 jkv357 is offline
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Quote:
Originally Posted by stevieboy22 View Post
What exactly are you looking for in a 'project RS50'?
Something a little rough, local, inexpensive, and a good candidate for a big bore and crank like the Top Performance kit.
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  #9  
Unread 12-31-2017, 09:26 AM
stevieboy22 stevieboy22 is offline
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Quote:
Originally Posted by jkv357 View Post
Something a little rough, local, inexpensive, and a good candidate for a big bore and crank like the Top Performance kit.
Sorry. All I can offer is the local part. Mines very nice and not inexpensive. Already has a BBK, pipe and carb.
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  #10  
Unread 05-30-2018, 08:23 AM
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I installed the Cast Iron top end on my "Ocho Cinco" build motor and snapped a few pics along the way.

The stroker crank was installed some time ago during our 2 motors in 24 hours case splitting party at Bats SF, but I've been so busy working on other bikes that I never got around to getting the top end on my own motor.



Laying out all the parts for the install



Base gasket and "Just in Case" rag put into place.



A little premix goes on all the internal parts. Interestingly this kit came with a small end bearing with the stroker crank and also one in the top end box, guess we get a spare for future use!



Piston Installed



Kit recommends Chamfering the ports, so I did.



After the ports were done, the cylinder got a rinse, liberal coat of premix, and slid into place



Cylinder head for the kit is a sweet 2 piece setup. lots of Vyton O-rings to install, a little grease helps them stay in place while its put together.







Done



Here are the instructions for reference





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www.JeniusBiker.com
Current: NCXD, Carlos, Newd, Aprilia RS10k, Max, Bangkok, Derbi ADV

Past: Yuki, Marco, Fumi, '16 & '15 RC390, '11 Madass,'98 Chester, '00 Mito, '12 PW50, KTM BR 65, Aprilia BR50, '06 Aprilia RS125, '04 DRD, 08 WR250X, 7x '03 Derbi SM's, 6x 99-04 Aprilia RS50's, 2x Derbi GPR, '00 Aprilia RS250, '99 Aprilia RS250, '95 Cagiva Mito 125, '04 & '95 NSR50R, '90 Honda NS50, '94 Honda RS125, '90 Honda RS80, '88 YSR63 (1st 2stroke!), '89FZ600, '89KLR250(1st Bike!)
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