Author Topic: Rebirth of paulages' cb735 (Read 115412 times)

paulages · « **Reply #100 on:** October 07, 2009, 10:24:08 PM »

doh! looks like you were right, TG... it only does it in third (my most used gear of course). guess the trannie is getting pulled this winter for undercutting. it's getting worse.

oh- and regarding the race bike and rules: apparently i will be able to run it in vintage open, so long as i change the clutch actuation and covers to look like a 500. kinda silly, considering the 550 clutch actuation is essentially the same as the 750, which can run up to '78 since the engine looks the same. silly rules.

turboguzzi · « **Reply #101 on:** October 07, 2009, 11:15:55 PM »

hope you get lucky with the shift fork, not easy to find them new (wonder why....)

my tuner friend simply rewelds the guiding area and then grinds them down for a good fit in the gear groove

shaise!

TG

Ryan 550k · « **Reply #102 on:** October 08, 2009, 07:30:19 AM »

Paul, if you end up needing a shifting fork check these guys out, http://honda.westernhillshondayamaha.com/home_honda.asp
The forks were a bit spendy, but last fall they had NOS available, but I would give them a call just to check.

paulages · « **Reply #103 on:** October 08, 2009, 10:46:15 AM »

Quote from: turboguzzi on October 07, 2009, 11:15:55 PM

hope you get lucky with the shift fork, not easy to find them new (wonder why....)

my tuner friend simply rewelds the guiding area and then grinds them down for a good fit in the gear groove

shaise!

TG

TG- so you think the problem then, is that the shift fork gets worn a little thin and doesn't quite hold the gear it's position? i'm trying to picture what's happening in my head... it seems strange that it only slightly slips and then goes back in so smoothly. welding it up sounds like an easy solution, provided that i can find specs for how thick it is supposed to be.

ryan- thanks for the WHH tip. i got several hard to find trans gears from them. not cheap.

turboguzzi · « **Reply #104 on:** October 08, 2009, 11:30:10 AM »

it's a mixture of things, wear on the fork faces, some free play of fork on shaft or drum, some extra clereance along the MS and CS and above all gear dogs with rounded corners that simply try to push out under load.

My bike was doing that only so often, like once every few laps and when I pulled every thing out the fork looked the worst.

It's been OK for two seasons but last race it did it again just once,

Am opening the motor anyway in three weeks (after the last race), so we'll see.

TG

paulages · « **Reply #105 on:** October 08, 2009, 10:20:47 PM »

Quote from: turboguzzi on October 08, 2009, 11:30:10 AM

it's a mixture of things, wear on the fork faces, some free play of fork on shaft or drum, some extra clereance along the MS and CS and above all gear dogs with rounded corners that simply try to push out under load.

My bike was doing that only so often, like once every few laps and when I pulled every thing out the fork looked the worst.

It's been OK for two seasons but last race it did it again just once,

Am opening the motor anyway in three weeks (after the last race), so we'll see.

TG

i want to wait until the winter to pull mine, but it sucks to not have a reliable third gear. it only does it when under heavy load, but that eliminates the fun riding. i don't need to ride that bike if i'm just putting around town... it wants the twisties! i think i'll just ship a separate gearset off to be undercut, and give the meshing teeth the same polishing treatment as the last ones before they go out. i still don't know if that helped, but it makes sense and was really easy to do.

Bill/BentON Racing · « **Reply #106 on:** October 10, 2009, 03:32:50 PM »

If I remember right 3rd gear was the one I had problems with also,it had enough play with new parts to want to shim,but too small to shim.It's a combination like TG said,but fork usually the culprit!Good Luck,Bill

paulages · « **Reply #107 on:** October 11, 2009, 01:16:01 AM »

Quote from: bellcow54 on October 10, 2009, 03:32:50 PM

If I remember right 3rd gear was the one I had problems with also,it had enough play with new parts to want to shim,but too small to shim.It's a combination like TG said,but fork usually the culprit!Good Luck,Bill

thanks... rode the same route today that wants 3rd gear most of the time, and i came up with a solution: go fast enough that 4th is in the sweet spot.

traveler · « **Reply #108 on:** December 14, 2009, 10:15:45 AM »

Paul,

I'm getting images of 650 pistons and a stage 2 650 head with strong cam in the future).

Would probably need some CR carbs and a BIG 4-1, huh?

~Joe

paulages · « **Reply #109 on:** December 14, 2009, 04:10:58 PM »

Quote from: traveler on December 14, 2009, 10:15:45 AM

Paul,

I'm getting images of 650 pistons and a stage 2 650 head with strong cam in the future).

Would probably need some CR carbs and a BIG 4-1, huh?

~Joe

CR carbs would be nice for sure... i'm just running CB750 carbs until i find an affordable set. i'm currently running a MAC header, only because i couldn't find anything else for the 650. eventually i'll make my own set and hopefully unchoke the exhaust.

paulages · « **Reply #110 on:** January 03, 2010, 11:00:26 PM »

finally have some time to get back to my baby, so i've done a few things... i need to send the trans off to get undercut, but i've been asked to put the bike in a "motorcycle art show" with other local builders, so it's crunch time to finish everything else and make it look good.

i made a better fairing frame for the SS fairing:

i'm experimenting with paint ideas, and this one is my favorite so far:

in black, and a little different...

in the cockpit:

i think i'm going to go with a nice red, like in the first photos, with a white pinstripe and the rest polished to 600 grit and clearcoated. opinions?

Retro Rocket · « **Reply #111 on:** January 04, 2010, 01:18:31 AM »

No opinion on the paint yet but that thing looks #$%* hot.....

Mick

traveler · « **Reply #112 on:** January 04, 2010, 01:32:59 AM »

I like the black, personally.

~Joe

Frankenkit · « **Reply #113 on:** January 04, 2010, 01:36:34 AM »

me, too.

Kemp · « **Reply #114 on:** January 05, 2010, 07:25:06 PM »

Red with gold outline might be cool, could transpose on seat as well. Question-you ever tried pistons from KZ650 in the CB650 block. They're 62mm, 2 valve, 15mm wristpin and have a nice dome.

pdxPope · « **Reply #115 on:** January 05, 2010, 08:00:26 PM »

Quote

"motorcycle art show" with other local builders

No #$%*? Any details for when and where?

-JP

ps- I like the black, too.

Ryan 550k · « **Reply #116 on:** January 05, 2010, 09:15:59 PM »

Quote from: pdxPope on January 05, 2010, 08:00:26 PM

Quote
"motorcycle art show" with other local builders

No #$%*? Any details for when and where?

+1

coldright · « **Reply #117 on:** January 05, 2010, 09:43:22 PM »

I really like the red, but I'm wondering if the swath isn't too high. The arc on top seems just a tad to high for the curve on the tank. Drop that a bit and I think it would be very sweet. Any red detail on the tail?

turboguzzi · « **Reply #118 on:** January 05, 2010, 11:35:06 PM »

hei paul

nice to see you back in action!

one comment,

that's a Ducati fairing right? Have a look at some side shots of 70's Ducs and I you'll see that it should be pointing a bit more upwards. I think its tilted down too much at the front right now.

Looking good but I'd skip on the red bit

did you end up opening the cases at the end?

Cheers
TG

Retro Rocket · « **Reply #119 on:** January 05, 2010, 11:38:03 PM »

Made up my mind, i would go with the black....

Mick

paulages · « **Reply #120 on:** January 06, 2010, 01:05:18 AM »

Quote from: turboguzzi on January 05, 2010, 11:35:06 PM

hei paul

nice to see you back in action!

one comment,

that's a Ducati fairing right? Have a look at some side shots of 70's Ducs and I you'll see that it should be pointing a bit more upwards. I think its tilted down too much at the front right now.

Looking good but I'd skip on the red bit

did you end up opening the cases at the end?

Cheers
TG

lots to respond to, but TG got the front of the line with that one...

yes, i know the 900SS sits differently, but i think it follows the lines of the tank better this way... i like the bottom line of the fairing to be in line with the bottom of the tank. i can still tweak it a little though, as the frame pivots at the front mount.

i haven't opened the cases yet.. this art show request thing got me in gear to work on the rest though. i was going to send out a spare trans for undercutting so i won't have to wait with open cases forever, but a member here just informed me he might sell me one already machined if his project works out.

paulages · « **Reply #121 on:** January 06, 2010, 01:06:15 AM »

Quote from: Kemp on January 05, 2010, 07:25:06 PM

Red with gold outline might be cool, could transpose on seat as well. Question-you ever tried pistons from KZ650 in the CB650 block. They're 62mm, 2 valve, 15mm wristpin and have a nice dome.

i haven't.. go for it!

paulages · « **Reply #122 on:** January 06, 2010, 01:07:00 AM »

Quote from: pdxPope on January 05, 2010, 08:00:26 PM

Quote
"motorcycle art show" with other local builders

No #$%*? Any details for when and where?

-JP

ps- I like the black, too.

jan 28th and somewhere in the pearl. i'll post info for people when i get it.

paulages · « **Reply #123 on:** January 06, 2010, 01:09:41 AM »

carrie's the only one who likes the red, huh? i think it make sit stand out in a way that it doesn't otherwise. the black just blends into everything else and seems kinda pointless to me. i later put a pinstripe around the paint, which i thought really improved it. it's now sanded down to 1000 grit and awaiting real paint and clearcoat, but you guys are making me second-guess...

hmm, i guess i'll sit on it for another day.

CBJoe · « **Reply #124 on:** January 06, 2010, 04:23:15 AM »

I think the red looks pretty sharp. I think a little colour on the tail would go a long way complementing the colour on the tank.
Joe

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Author Topic: Rebirth of paulages' cb735 (Read 115412 times)

Ryan 550k

traveler

traveler

Ryan 550k