testy

Author Topic: Let's go roadracing...continuing saga  (Read 88021 times)

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Offline bwaller

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Re: Picture Time...now it lives.
« Reply #50 on: April 17, 2011, 03:05:19 pm »
Well folks, it lives!  ;D Last week I took the bike to weigh it on a set of electronic scales and it settled at 322lbs dry. My focus changed near the end to just finish the bike and figure I can take more weight off at a later date. I'm happy enough considering the 750F2 forks and stock steering stem are heavy items. I can shave more easily enough.

With the race gas mixture finally organized I set fuel levels on the VM29's. I then decided come hell or high water it was going to run today. I thought I had ordered smaller pilot jets but had forgotten, figured the 117.5's would be way large. Finished up all the remaining jobs and pushed it out the door.

There is lots of compression  ;) and after a couple loud backfires realised I had the coils wired wrong, hadn't packed the 2" baffle and as a result had scared the crap out of my dog. After securing some help pushing it came to life. After three years it feels pretty good.  It's too rich all over but I managed my thirty second break-in procedure and the helper kept an eye on the pressure gauge I mounted to monitor the start up oil pressure with a 650 pump. No initial oil leaks, the eight plate clutch seems fine and the transmission shifts through the first three gears fine.  GSXR tach doesn't work so need to check that out.

I threw in the towel to watch the Assen WSB round and will get smaller pilots before I go any further. Just a couple pics for now.


Made a better chain idler with larger bearings.





My original number was 73 so figured second time round...







Offline paulages

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Re: Picture Time...now it lives.
« Reply #51 on: April 17, 2011, 03:41:33 pm »
Great news, Brent! It's good to see it finally come alive.
paul
SOHC4 member #1050

1974 CB550 (735cc)
1976 CB550 (590cc) road racer
1973 CB750K3
1972 NORTON Commando Combat
1996 KLX650 R

Offline Tintop

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Re: Picture Time...now it lives.
« Reply #52 on: April 17, 2011, 04:27:33 pm »
Well done, can't wait to see it on the track.
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline Bill/BentON Racing

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Re: Picture Time...now it lives.
« Reply #53 on: April 17, 2011, 05:25:57 pm »
Cool man! Way to go,it's a little fat with 117.5's pilots!....17.5's!,Will pm you back on jetting,didn't know you were going to crank today.what needles.and mains etc.? Lots of tunability in the 29's!Good luck,don't it feel good? ;D 8),Bill
probably got 5DL-31 needle,115 mains?
BentON Racing Website
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline bwaller

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Re: Picture Time...now it lives.
« Reply #54 on: April 17, 2011, 06:12:03 pm »
Yea Bill those 117.5 pilots are a little large, even the 17.5's!  ;D  I've got lots of mainjets to choose from, every size pilot is still available, but needles are a different story. I do have 5DL-31, but like yours I expect these are too rich. There used to be a ton of needle options but I haven't found anyone offering them these days. If you have a source please share! I'll call Jeff @ Z1 tomorrow, he has a great selection of everything else.
« Last Edit: April 17, 2011, 06:13:38 pm by bwaller »

Offline MRieck

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Re: Picture Time...now it lives.
« Reply #55 on: April 17, 2011, 06:18:13 pm »
 God that bike looks nice. It will haul asss too!
« Last Edit: April 17, 2011, 06:19:48 pm by MRieck »
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Offline FunJimmy

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Re: Picture Time...now it lives.
« Reply #56 on: April 17, 2011, 08:17:59 pm »
Nice going Brent.
It’s a good feeling when it fires up as planned.
BTW, if you can’t get that GSXR tach to work, try a VF750 electronic tach.
They work fine with your Dyna ignition.

FJ
You never see a motorcycle parked outside of a psychiatrist's office!

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Offline turboguzzi

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Re: Picture Time...now it lives.
« Reply #57 on: April 18, 2011, 12:43:49 am »
heee-haaa!!!

big congrats.

mixing up the coil's wires is a classic, got flames coming out the carbs initially.... both in CB and GPZ...

when are you taking her to the dyno?

TG


Offline voxonda

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Re: Picture Time...now it lives.
« Reply #58 on: April 18, 2011, 03:59:03 am »
Hey Brent,

Wooow.... this bike surely got the X-factor! Great looking and ENJOY!!

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #59 on: April 18, 2011, 04:09:02 am »
Jim, I have a 10K Honda tach but thought the needle might be pinned to often, plus this one is much lighter. I figured I had it wired correctly but will re-investigate.

TG, after some carb sorting and I'm confident I've done all I can, I'll trot off towards the dyno.


Thanks for the kind words guys. It's been the only project in my shop for a long time and needs to be done.  ;) It's certainly nothing exotic.

It may be a little too pretty around the edges though. I think to break it in, I should push it out the shop door and let it fall over to christen it. 

Offline martin426

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Re: Picture Time...now it lives.
« Reply #60 on: April 18, 2011, 05:17:44 am »
Really nice job Brent!  Looking forward to seeing her in action and meeting you early June at the Quinte TT. 
What did you end up sorting re. fuel choice/mixture?   
 
Scott
1978 CB550
1970 CR750 replica
1979 RCB1000 replica
1988 RC31

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #61 on: April 18, 2011, 05:36:32 am »
Hi Martin, don't expect too much from this ole rusty dude.  How's your cool 550 proceeding? It'll be good to prop up the mid prod class.

Re fuel I believe straight U4.4 would be a great fit for power & potential protection from detonation, but it's too much coin for my comfort. I'll mix high test pump 50/50 with C12. No bump in power but I'm really not looking for that anyway. I found a guy that'll re-fill my 5 gal can for around $60 when I need it so I can live with that.

See you in June. Do you know of any track days at Shannonville beforehand? I'd like to get seat time & sort through suspension.

Offline Sam Green Racing

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Re: Picture Time...now it lives.
« Reply #62 on: April 18, 2011, 08:27:26 am »
God that bike looks nice. It will haul asss too!

Seconded 8) 8) 8) next months Bike of the Month perhaps. ;)

Sam. ;)
C95 sprint bike.
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Offline martin426

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Re: Picture Time...now it lives.
« Reply #63 on: April 18, 2011, 09:01:45 am »
There are two track/test days I know of at SMP prior to the VRRA June event, both offered by PRO6CYCLE ... Monday 02 May (Nelson track) and Monday 09 May (Long track). 
$60 for 5gal of C12 is very good... I just paid $90  >:(
 
The 550 is coming along.  Just put the motor back in the frame and getting things back together for "fire-up" this weekend.  Here's a pic taken a few weeks back before a bunch of  frame mods, paint etc.
I'll take a few new ones and post in a new thread.   
 
Cheers!
Scott
 
1978 CB550
1970 CR750 replica
1979 RCB1000 replica
1988 RC31

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #64 on: April 18, 2011, 09:57:55 am »
Sorry Scott, got your name wrong.  ::) Cool looking bike man, hope the start up goes well. Actually I paid more than that for C12, mostly because of hazardous transport, crap. This other guy is across the border in NY and will pump it out of a drum he keeps re-sealing thus the better price. Hopefully all the volatile goodies are still in the gas.   

I got an e-mail recently from Denis asking if I wanted a tank...rotten buggar!  ;) Thanks for the info re PRO6CYLE.

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #65 on: April 23, 2011, 02:56:33 pm »
I switched to a #15 pilot and smaller mains and it's now a bit lean on the bottom with the airscrews nearly all the way closed, I'll throw the 17.5 back in and play with settings again. I took it out for a few miles of testing and the little buggar likes to rev. Tomorrow I'll take a plug wrench and pick a good spot for a plug chop.

I have short final gearing on it and the first time through all six gears I could barely shift fast enough. I actually thought I was getting clutch slip but no-sir the g-box ratios are tight and the difference compared to a stock box is night & day. It shifts flawlessly and I'm thrilled.   ;) Getting closer to "dyno day".

Oh yea baby, I'm gonna have a blast on this thing.  ::)






Offline andy750

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Re: Picture Time...now it lives.
« Reply #66 on: April 23, 2011, 04:02:43 pm »
Looking good Brent! Looking forward to the first ride report and hearing how those rear shocks perform. And of course looking forward to the dyno results!

good luck!
Andy

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild.
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003
4. XLR650L 2006

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #67 on: April 23, 2011, 04:21:03 pm »
Thanks Andy. I've had Works shocks for a lot of years and this is bike #3 . It's a nice shock and somewhat built to your specs. You know it's not the most important thing to me what kind of power this engine screws, but I'd be a liar to say I'm not curious.

Offline MRieck

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Re: Picture Time...now it lives.
« Reply #68 on: April 23, 2011, 04:43:15 pm »
Damn Brent that is motorcycle sex! ;) ;D
Owner of the "Million Dollar CB"

Offline paulages

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Re: Picture Time...now it lives.
« Reply #69 on: April 23, 2011, 09:15:46 pm »
Damn Brent that is motorcycle sex! ;) ;D

If that's sex, I'd like to see what babies it would make.  ;D
paul
SOHC4 member #1050

1974 CB550 (735cc)
1976 CB550 (590cc) road racer
1973 CB750K3
1972 NORTON Commando Combat
1996 KLX650 R

Offline turboguzzi

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Re: Picture Time...now it lives.
« Reply #70 on: April 23, 2011, 11:55:01 pm »
How are the goosebumps then? :)

was just going to ask you if that box shifts, good to hear that it works

are you going to run carb filters? think i'm seeing some.....

TG

Offline bwaller

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Re: Picture Time...now it lives.
« Reply #71 on: April 24, 2011, 04:33:11 am »
Yea TG I'm going to use these dual sock foam filters that fit over the stacks & Mikuni spacing. Inside there is 37mm between the stack inlet and back of the filter. Not ideal for peak power perhaps, but this is recreation.

Not sure about any sex issues, but thanks for the thought guys.

Offline DannyBhoy

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Re: Picture Time...now it lives.
« Reply #72 on: April 24, 2011, 05:42:55 am »
Brent, great build. I have been following it for much longer then the thred. I'm suprised you have time to work on it with the sap running freely.
I can wait to see your dyno #'s.  Your attention to every details is great. Looking forward to hearing that slik smooth gearbox.
I hope to be visiting Jackson rd soon(LOL).
Cheers big ears
The older I get the faster I was.

Offline Bill/BentON Racing

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Re: Picture Time...now it lives.
« Reply #73 on: April 24, 2011, 07:24:27 am »
WOW Brent,Awesome,Two rides on Samauto for one on yours!!!!!! ;) ;D ;D 8),Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline 754

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Re: Picture Time...now it lives.
« Reply #74 on: April 24, 2011, 08:42:45 am »
 Nice looking bike Brent..

 is that your orchard behind it?? we still got  few here but they are disappearing a lot lately.
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Kelowna B.C.       Canada

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It's All part of the ADVENTURE...

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