Author Topic: Classic Bonneville Racer  (Read 116433 times)

0 Members and 2 Guests are viewing this topic.

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #650 on: August 31, 2021, 08:40:11 PM »
Tried today with 17x40 and ran 138 at 9,100 rpms...........second run with 17x44 sprockets and went 136 at 9,400 rpms..........Then advanced the timing by 2-degrees and ran 134 into a 3-mph headwind.

Will begin tomorrow with 16x44 sprockets.

Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #651 on: August 31, 2021, 11:49:56 PM »
😃

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #652 on: August 31, 2021, 11:50:34 PM »
😁

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #653 on: August 31, 2021, 11:51:23 PM »
No clue who this character might be.🤣

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #654 on: August 31, 2021, 11:52:24 PM »
😀

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: Classic Bonneville Racer
« Reply #655 on: September 01, 2021, 03:13:38 AM »
No clue who this character might be.🤣

Frankie, here's a clue. J MF G. lol.
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,367
  • SOHC4 member # 2605
Re: Classic Bonneville Racer
« Reply #656 on: September 01, 2021, 05:03:37 AM »
MFer
David- back in the desert SW!

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,324
  • Central Texas
Re: Classic Bonneville Racer
« Reply #657 on: September 01, 2021, 08:27:06 AM »
Tried today with 17x40 and ran 138 at 9,100 rpms

What is the record in your class?   Good Luck!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,912
  • Bought her new 4/75
Re: Classic Bonneville Racer
« Reply #658 on: September 01, 2021, 09:46:27 AM »
Tried today with 17x40 and ran 138 at 9,100 rpms...........second run with 17x44 sprockets and went 136 at 9,400 rpms..........Then advanced the timing by 2-degrees and ran 134 into a 3-mph headwind.

Will begin tomorrow with 16x44 sprockets.

Are these runs in 4th or 5th?
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #659 on: September 01, 2021, 05:34:58 PM »
5th.......................

Windy on Wed. AM................made a run at noon and went 134ish with 16x44 at 9,800 rpms and 3 mph head-cross wind.

Parked and packed up :(

Had a fun week with many old and new friends. My 4-man pit crew was a BIG help. My conclusion is the motor is down 2 or 3 HP due to different base-gasket and head-gaskets with resultant loss of compression. Now I have to decide what to do for 2023.......we plan to be in Alaska for the entire summer of 2022.
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,367
  • SOHC4 member # 2605
Re: Classic Bonneville Racer
« Reply #660 on: September 01, 2021, 05:51:15 PM »
Glad you had fun on the salt this year... Time to clean up and think about next steps. Safe travels to you next destination. Thanks for sharing the experience with us!
David- back in the desert SW!

Offline bwaller

  • Really Old Timer ...
  • *******
  • Posts: 7,484
Re: Classic Bonneville Racer
« Reply #661 on: September 02, 2021, 11:58:19 AM »
I can see it's a bloody struggle and easy to be discouraged working for a very few runs once a year.

I also wouldn't doubt the salt is faster or slower certain years. Good work, you have the support of everyone here. 


Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #663 on: September 03, 2021, 08:31:59 AM »
A BIG THANKYOU 8) 8) 8) to all of you for your support :)

While I was not as fast as I needed to be, the event is great fun and I enjoy the challenge. My crew says they anticipate more in the future. There were a lot of new faces and bikes at the event. It was personally rewarding to answer questions from some of the riders concerning tires, handling, and how to slow-down after the timed mile without sliding the rear wheel.

One rider experienced a near fatal heart-attach at the starting line......fortunately someone was able to revive him. It was announced at the next day's rider's meeting that he was having quadruple by-pass surgery. The hat was passed and many stepped-up with cash to help with expenses.

I have thoughts of getting more power from this motor............and/or going to a bigger motor and use my existing chassis. Several riders were taking detailed pics and asking questions regarding stability and narrow tires.
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #664 on: September 03, 2021, 06:42:45 PM »
Dennis,

I'm putting the 2023 event on my bucket. Add one to the crew!!

Offline gschuld

  • Master
  • *****
  • Posts: 2,346
Re: Classic Bonneville Racer
« Reply #665 on: September 03, 2021, 07:07:08 PM »
Very cool Dennis.  Maybe I’ll get my 💩 together by 2023 and bring something to run.  I’ve been too distracted with other things to focus on a once a year bike.

George

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #666 on: September 04, 2021, 11:25:35 AM »
Happy to have you along ;D ;D

Frankie........bring your leathers, just in case ;)
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline gschuld

  • Master
  • *****
  • Posts: 2,346
Re: Classic Bonneville Racer
« Reply #667 on: September 05, 2021, 12:52:30 PM »
Frankie would be first rate company…and a talented wrench and driver!

Dennis, when do they usually announce the date for the next years event?

George

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #668 on: September 05, 2021, 02:12:14 PM »
Sat. - Thur. leading into Labor Day weekend.

Ran the bike today after initial clean-up. Now to REALLY wash all of the salt away and investigate why I don't have enough power ??? Very little salt on the bike as opposed to other years. Maybe I can re-use a chain to two on my other bikes.
« Last Edit: September 05, 2021, 02:16:18 PM by Old Scrambler »
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,115
  • CB750F Dragbike
Re: Classic Bonneville Racer
« Reply #669 on: September 05, 2021, 04:16:30 PM »
Happy to have you along ;D ;D

Frankie........bring your leathers, just in case ;)

Don't tempt me. Lol

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #670 on: September 10, 2021, 04:28:52 PM »
After my second run I checked the carb-bowls because I could hear a slight problem on one cylinder. I discovered a significant amount salt in #3 jet-bowl so cleaned all and flowed fuel to make sure all was clean. Re-checked the bowls after another run and nothing. Today I removed the carbs and found salt-slush in #4 and a few grains in #2 & #3. A then found the source :o..........I had installed new fuel lines and clamps but apparently the clamp to #3-4 fed by the right-side tank was not sealed. No salt was apparent in the fuel-rail, but #4 main bowl has salt residue in the threaded area at the bottom. There was no evidence of a fuel leak and the jets are clean. I will pull the head over the next week or so.............I don't think salt burns with any positive effect on power >:(..........more later ;) ;)
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,367
  • SOHC4 member # 2605
Re: Classic Bonneville Racer
« Reply #671 on: September 10, 2021, 06:57:01 PM »
Oh, that’s potentially very bad…
Hopefully…No damage

Good luck cleaning things up…
David- back in the desert SW!

Offline johno

  • Expert
  • ****
  • Posts: 1,316
Re: Classic Bonneville Racer
« Reply #672 on: September 10, 2021, 07:23:26 PM »
Hi Den,
After a trip to the lake The clean up is extensive hey !
Re the hose clamps not tight, Are you sure the salt or residue is coming in with the fuel ?  more likely its from the carb vents as the whole carb area at full noise is just a dense cloud of ultra fine salt air that is drawn into and out of as temp changes on the run and return to the pits.
Its quite common and difficult to deal with, the most common way Ive seen is small fuel filters on all engine and carb / tank breathers.
Nothing you haven't thought of I'm sure Dennis , just raising the issue so others are aware.
cheers Johno
GRASSHOPPER SOHC HONDAS ARE THE MEANING OF LIFE.

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: Classic Bonneville Racer
« Reply #673 on: September 10, 2021, 08:51:34 PM »
Due to my ram-air intake system, the bowl vents have long lines leading into the air-box. More things to check but likely from the fuel rail.
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,275
  • Humboldt, AZ
Re: Classic Bonneville Racer
« Reply #674 on: September 10, 2021, 10:00:44 PM »
Dennis, if there were leaks in the fuel rail, it would have leaked fuel out, not sucked salt in...
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....