Father Son 75 CB200T Rise From the Ruins
- Thread starter Texasstar
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Texasstar
Can't is a four letter dirty word
The picture above is a piston for a xs650 that Arias made in the 80's it is forged and heavy. JEpistons says they are the "first" asymmetrical piston maker... http://www.jepistons.com/Articles/101124-Asymmetrical-Forged-Pistons.aspx
What do y'all think of the JE? Offset wrist pin etc?
Sent from my iPhone using Tapatalk
What do y'all think of the JE? Offset wrist pin etc?
Sent from my iPhone using Tapatalk
There are two things to notice about the JE piston. First up, it's a slipper piston - a design that has been around for decades. It is a good design that minimizes weight and viscous drag and is stiff across the pins bores so it's strong too.
And of course, there's the asymmetric design idea which has a wider thrust face than the non thrust face - a subtle improvement over older slipper designs.
And of course, there's the asymmetric design idea which has a wider thrust face than the non thrust face - a subtle improvement over older slipper designs.
Trevor May
Been Around the Block
I took a look at their webpage and they don't have anything specifically for the cb200. Is this another job of matching a piston to your bore?
Btw I'm a lowly subscriber. Love the build! I'm trying to keep up with all the technical building you're doing.
Btw I'm a lowly subscriber. Love the build! I'm trying to keep up with all the technical building you're doing.
Texasstar
Can't is a four letter dirty word
Hey Duchat we are Zeelanders also known as lowlandersDuchat said:
We stumbled across those Arias pistons with a tight skirt down in Austin Texas visiting with a guy who is passionate about the xs650. (He also has a TZ he is restoring and a cr750 replica) We were doing some research for a friend who wanted to rephase his xs. What we learned is the 650 suffers from the same piston and combustion chamber problems we have however its head breathes way better than ours and after it is gas ported you can drive a truck through it! The XS also has guys who love its platform as much as we love Lucky. Hugh's rephases cranks 180, 270, and 277 and has gotten rid of the battery. Pamco developed an electronic ignition that go rid of the manual advance. We have learned to discard looking for cb200 parts. In looking into the Arias piston I stumbled across the JE pistons. So because of that serendipity we learned about asymmetrical piston design.Sent from my iPad using Tapatalk
Texasstar
Can't is a four letter dirty word
check this out a rephase 270
"Thats right folks, we finally built a 270 Degree Rephased XS650 Engine
Ok, here comes the flood of emails, questions, etc... So I'll just quote Wikipedia for the reason to rephase an OEM Firing Pattern of 360 (which is the stock XS650 engine configuration) to a 277 or 270
"The classic British parallel twins (BSA, Triumph, Norton, AJS & Matchless) had a 360° crankshaft that, compared to a single, gave twice as many ignition pulses, which were evenly spaced.
The Yamaha TRX850 had a 270° crank that allowed a more regular firing pattern than a 180° crank, and less regular than a 360° crank. This configuration has the best possible secondary engine balance for a parallel twin; its exhaust sound and power delivery is identical to a 90° V-twin." - Think Ducati or Suzuki SV Series engines
While we do a TON of 277 engines (it's the most cost effective rephase for the XS650) this one is 270 degrees. I've always wanted to build one. It requires a specially made center pin for the crank ($$$$$) and 2 donor cranks to build a single 270 crank. Then the camshaft and ignition must also match the new firing order of course.
What you see here, is a 750cc 270 Degree XS650 Engine, using JE Pistons, our HHB D-Shaped Ported Head, 5th Gear OD, HHB 6 into 7 Clutch mod, 5th Gear OD, HHB Oil Cooler and all the other little tricks we do at Hugh's HandBuilt
I hope you enjoy it. Go find our Blog, and check out the other cool things you can do with these bikes. They are a blast to own, mod and work on.
Hugh"
http://youtu.be/pbfHU0hyZ7s
"Thats right folks, we finally built a 270 Degree Rephased XS650 Engine
Ok, here comes the flood of emails, questions, etc... So I'll just quote Wikipedia for the reason to rephase an OEM Firing Pattern of 360 (which is the stock XS650 engine configuration) to a 277 or 270
"The classic British parallel twins (BSA, Triumph, Norton, AJS & Matchless) had a 360° crankshaft that, compared to a single, gave twice as many ignition pulses, which were evenly spaced.
The Yamaha TRX850 had a 270° crank that allowed a more regular firing pattern than a 180° crank, and less regular than a 360° crank. This configuration has the best possible secondary engine balance for a parallel twin; its exhaust sound and power delivery is identical to a 90° V-twin." - Think Ducati or Suzuki SV Series engines
While we do a TON of 277 engines (it's the most cost effective rephase for the XS650) this one is 270 degrees. I've always wanted to build one. It requires a specially made center pin for the crank ($$$$$) and 2 donor cranks to build a single 270 crank. Then the camshaft and ignition must also match the new firing order of course.
What you see here, is a 750cc 270 Degree XS650 Engine, using JE Pistons, our HHB D-Shaped Ported Head, 5th Gear OD, HHB 6 into 7 Clutch mod, 5th Gear OD, HHB Oil Cooler and all the other little tricks we do at Hugh's HandBuilt
I hope you enjoy it. Go find our Blog, and check out the other cool things you can do with these bikes. They are a blast to own, mod and work on.
Hugh"
http://youtu.be/pbfHU0hyZ7s
Texasstar
Can't is a four letter dirty word
It is worth a lot since you are running them. I have been looking at 58-62 mm piston on JE's site and there doesn't seem to be a significant weight savings over the cb200 pistons. The TBOLT pistons do but I didn't get a warm fuzzy about them after talking to the owner. We are gonna try them in Zeke's other build and see what happens. We haven't blown anything up yet so I don't think we qualify as engine builders until we doSonreir said:
We are gonna approach arias and JE and see if we can get help from one of them...Lotsa room on that fairing Sent from my iPhone using Tapatalk
