Zoöid Third Times a Charm CB175

the 57mm Tbolt, 54mm WStandard, 52mm Stock175, 53mm Art, 54mm cb72 piston
 

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54mm WStandard vs Stock 53mm ART Honda cb175 piston
 

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Now that we know the manufacturer I have sent them an email to see if we can get different Pistons with a 14mm pin.
 
Texasstar said:
The Honda TRX Quad racing piston is in...for examination. As expected it is Chinese but I put it up to y'alls scrutinity please tell me anything that you would like me to measure.
Click to expand...

- The TRX ring lands look wider than the Tbolts.. if true, this could cause a ring flutter issue at rpm.

- What is the top displacement of the TRX piston? IIRC the Tbolt is 5cc yes/no ??
 
Q said:
- The TRX ring lands look wider than the Tbolts.. if true, this could cause a ring flutter issue at rpm.

- What is the top displacement of the TRX piston? IIRC the Tbolt is 5cc yes/no ??
Click to expand...
the TRX is 54mm and the TBolt is 57mm. I will mic the rings later.
 
What do y'all think about the distance from the landing to the first ring?
 

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I often machine mine down like the one on the left and machine a matching amount off the barrels to raise CR. If it's 2.5mm or more, it's OK and as for rings, the thinner the better of course. 0.8mm is best.
 
teazer said:
I often machine mine down like the one on the left and machine a matching amount off the barrels to raise CR. If it's 2.5mm or more, it's OK and as for rings, the thinner the better of course. 0.8mm is best.
Click to expand...

What do you do for the cam gear? Just slot it?
 
I slot the cam sprocket for CB72 and 200. CB160/175 needs an adapter or press off the sprocket and press it back on in a different position.

BTW, OEM sprockets are pretty soft around the core and are easy to slot.
 
Sonreir said:
What do you do for the cam gear? Just slot it?
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here is a picture of the cappellini adjustable cam sprocket.
 

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teazer said:
I often machine mine down like the one on the left and machine a matching amount off the barrels to raise CR. If it's 2.5mm or more, it's OK and as for rings, the thinner the better of course. 0.8mm is best.
Click to expand...
measured it this morning and it is only 2mm.
 
that's not a lot but is probably enough.

how thick are the rings? on high rpm cb77 with highly modified cb350 pistons and stock thick rings, rings did not last more than a few races and had to be replaced.

For fuller's bike I would think that torque is what you need and high sustained revs are not an issue. Think big bore, clean ports and high compression as a starting point. I can probably send you a 200 crank and barrels to work with and get say a pair of CB750 liners and maybe CB77 oversize pistons or even CB 350 pistons to start with.

OK so that might be going a little too far, but if you need anything measured, drop me another PM/email and I'll see what dimensions of parts we have here.
 
teazer said:
that's not a lot but is probably enough.

how thick are the rings? on high rpm cb77 with highly modified cb350 pistons and stock thick rings, rings did not last more than a few races and had to be replaced.

For fuller's bike I would think that torque is what you need and high sustained revs are not an issue. Think big bore, clean ports and high compression as a starting point. I can probably send you a 200 crank and barrels to work with and get say a pair of CB750 liners and maybe CB77 oversize pistons or even CB 350 pistons to start with.

OK so that might be going a little too far, but if you need anything measured, drop me another PM/email and I'll see what dimensions of parts we have here.
Click to expand...
Sorry about that got distracted. The W standard rings are 1mm thick while the T-bolt rings are .8mm thick. On the Tbolt the landing to the first ring is 3.5mm.

We have fun going to far!!! I will PM you! Is your pink possum email still valid? I sent you an email but probably ended up in your spam folder. I have a dialog now with Akunar but haven't connected with Hispeed yet. Met a good friend of my wife's uncle who sells tools and has a rep in Thailand. Doing some research on Honda's relationship with ART that is in Thailand. I will PM you later.


Sent from my iPhone using Tapatalk
 
teazer said:
I'll check spam folder but it may have been emptied....
Click to expand...
Teazer I have a racing question for you. Do y'all short shift the vintage bikes like they do with say the formula fords in open wheel racing?


Sent from my iPad using Tapatalk
 
Not unless there is a good reason to do so like say a combination of corners that needs you to be in a higher gear than you would be in. I guess if you had a huge lead, you could short shift (change up at lower revs) to save teh motor, but I'm not that fast and need every rev I can muster.

Why do you ask? What are you thinking there?
 
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