Zoöid Third Times a Charm CB175

[Texasstar]

Youre as good a person to answer that as any.
As alway whats your cc, what other mods, what gas,and where on the throttle is the bike going to spend its time

I guess what I should've said has anybody tried the flat sides on the small twin?

 

[simo]

http://www.caferacer.net/forum/general/9273-question-about-cb160-mikuni-vm22.html

 

[Quixotay]

I guess what I should've said has anybody tried the flat sides on the small twin?

DTT
http://www.dotheton.com/forum/index.php?topic=35175.0

or

For more info give em a call (number on home page)
http://www.teamcalamari.com/dox/tekcarb24.html

or

EDIT ADD: Better yet, head to HT and send a pm to oljoehonda, he's been around the block and built this beauty... you probably saw him race in Alabama (very nice person and a Texan too IIRC!)

50 pictures: (CORRECTED LINK)
http://s683.photobucket.com/user/oljoehonda/library/1968%20Honda%20CL175%20Race%20Bike%20Build?sort=2&page=1

Joe's HT Project Log
http://www.hondatwins.net/forums/1-project-logs/42899-1968-cl175-race-bike-build.html

I asked the same question on HT some time ago (June)... not much of a response...
http://www.hondatwins.net/forums/41-fuel-supply-carburation/38594-round-vs-flat-side-carbs.html

 

[Texasstar]

AKUNAR is Hispeed these are the RX54 and RX56mm. I will take more pictures of the rings later

 

[barnett468]

AKUNAR is Hispeed these are the RX54 and RX56mm. I will take more pictures of the rings later

Are these to get the compression up as I suggested?

 

[barnett468]

I guess what I should've said has anybody tried the flat sides on the small twin?

I have run them on similar bikes.

No matter what you do, you need to make the intake boot the same size as the carb venturi if you want full flow from them.

I would try some accelerator pump type carbs.

 

[simo]

AKUNAR is Hispeed these are the RX54 and RX56mm. I will take more pictures of the rings later

What did they cost? Can you put them side by side (pin alligned) with stock pistons

 

[Texasstar]

What did they cost? Can you put them side by side (pin alligned) with stock pistons

sure sorry we got sidetracked. The were 120.00 for all 4 Pistons including shipping. https://youtu.be/0r4NxWnVZ38.

 

[Texasstar]

Stock cb175 52mm piston vs ART 53mm

 

[Texasstar]

Hispeed/Akunar 54mm vs 52mm cb175 stock piston

Rings are .87mm

5.97 mm from deck to first ring

13.67 mm deck to top of pin

18.82 mm dome to top of pin

 

[Texasstar]

Tbolt left vs the HiSpeed right

 

[Texasstar]

Wstandard Trex vs Hispeed

 

[Luugo86]

Very cool thread, Lot's of creative fabrication work and design.. I'm currently building a '71 SL175, since the 175/200 platform seems to be your wheel house maybe you could hook me up with some good resources for parts and engine components

 

[DohcBikes]

Very cool thread, Lot's of creative fabrication work and design.. I'm currently building a '71 SL175, since the 175/200 platform seems to be your wheel house maybe you could hook me up with some good resources for parts and engine components

Swap in a thumper

 

[Texasstar]

Very cool thread, Lot's of creative fabrication work and design.. I'm currently building a '71 SL175, since the 175/200 platform seems to be your wheel house maybe you could hook me up with some good resources for parts and engine components

Luugo86 it seems craiglist and buying complete bikes has been the cheapest for us. We have a head we bought off of eBay for 19 bucks that did 100mph and it looked like the moon in one of the combustion chambers. We have also bought complete bikes from salvage yards.

 

[simo]

Swap in a thumper

WhY

 

[simo]

Thanks for all the side by sides
do you have a preference?

 

[crazypj]

That's a neat lathe, should be able to get into some real 'weird' manufactured parts now.
Personally, although 'everyone' uses QCTP I'm not a big fan of them on small lathes.
Back off the compound slide to reduce the torque 'bending' tool into work or chuck (you get tapers or 'digging in' when it happens)

 

[Texasstar]

Thanks for all the side by sides
do you have a preference?

yes the Hispeed/Akunar since it is almost identical in deck height to the stock Pistons. Also we learned on our previous builds we have about .120" to play with milling off the head/cylinder. We have a cb160 head already ported and ready for 11.3-1 compression. We are curious what it will do on they Dyno

 

[simo]

Thats good to know, Akunar used to do cylinder sleeves as well, i wonder if they have anything that would work