Author Topic: The 1970 Daytona CR750s. (Read 267105 times)

ttr400 · « **Reply #525 on:** January 12, 2010, 08:56:37 AM »

Can someone help with the OD and ID (In mm's) of the top ring (holding the glass) of the real 970 part tach? H2Eric maybe.

Thought I would document my CR build here, should I start a topic in the projects section or in the racing forum?

Thanks Kevin

Zig · « **Reply #526 on:** January 12, 2010, 07:34:06 PM »

Quote from: ttr400 on September 09, 2009, 11:09:16 PM

Sam, A Mann's bike for sure, it remains to be seen if I'm man enough for the machine..........
Hey nothing wrong with them little screamers..

I was at Mosport for the 40th anniversary of the GP and met Tom Faulds and he told me the whole story about the 6 that he rescued from the science center and eventually went back to Japan. he said that Honda didn't even know it was there. It was a 297cc model and he happened to have a used piston.

Kevin

Met Mr. Faulds at an event in North Bay a couple of yrs ago, interesting fella and an interesting story, especially the part about how Honda got the bike back. Was introduced by a buddy of mine, Fred Gailey, Mosport GP winner 1964 (or 65, hmmm). Beautiful little machine, the cam gear drives are a beauty to behold.

Sam Green Racing · « **Reply #527 on:** January 12, 2010, 10:52:15 PM »

Quote from: ttr400 on January 12, 2010, 08:56:37 AM

Can someone help with the OD and ID (In mm's) of the top ring (holding the glass) of the real 970 part tach? H2Eric maybe.

Thought I would document my CR build here, should I start a topic in the projects section or in the racing forum?

Thanks Kevin

Hi Kevin, you can post it here or start your own thread in the hipo forum, I'm sure the bike will be megga hipo knowing your work.

Sam.

H2Eric · « **Reply #528 on:** January 13, 2010, 08:56:01 AM »

Quote from: ttr400 on January 12, 2010, 08:56:37 AM

Can someone help with the OD and ID (In mm's) of the top ring (holding the glass) of the real 970 part tach? H2Eric maybe.

Thought I would document my CR build here, should I start a topic in the projects section or in the racing forum?

Thanks Kevin

Hi Kevin
The OD of the top ring is 80.40mm which would indicate that the glass itself is 80.00mm. Can't tell for sure as the ring doesn't appear to come off. It looks like it was pressed on at the factory and they never intended for it to come apart. If perchance it does come to bits could someone enlighten me.

Cheers
Eric

ttr400 · « **Reply #529 on:** January 13, 2010, 11:13:29 PM »

Thanks Sam. It's going to be good one.

Eric, thanks that is what I was looking for . the other size was the width of that same ring. When looking at the face it's the section over the Glass face. many thanks.

Oh, I don't think they are meant to come apart.

Kevin

H2Eric · « **Reply #530 on:** January 17, 2010, 09:33:07 AM »

Quote from: ttr400 on January 13, 2010, 11:13:29 PM

Thanks Sam. It's going to be good one.

Eric, thanks that is what I was looking for . the other size was the width of that same ring. When looking at the face it's the section over the Glass face. many thanks.

Oh, I don't think they are meant to come apart.

Kevin

Hi Kevin
The diameter of the glass that is exposed is 67.75mm. Depth of ring 7.5mm

Cheers
Eric

Ricky_Racer · « **Reply #531 on:** January 17, 2010, 10:02:44 AM »

Eric, the measurements of mine are the same. Does anyone have any suggestions on how best to replace the rubber support o-ring? Thanks! RR

ttr400 · « **Reply #532 on:** January 18, 2010, 09:52:31 AM »

That's exactly what I was looking for many thanks H2eric and RR for comfirmation.

To replace the o-ring, get one the same size and cut it, then join together with super glue. I'm going to do this with the set up i am making for my oil pressure gauge.

Kevin

Ricky_Racer · « **Reply #533 on:** January 19, 2010, 03:11:39 PM »

Thanks, Kevin. Great solution. I didn't fancy prying open the clips holding the o-ring and possibly breaking them.

RR

lordmoonpie · « **Reply #534 on:** January 21, 2010, 07:31:39 AM »

Quote from: ttr400 on January 18, 2010, 09:52:31 AM

That's exactly what I was looking for many thanks H2eric and RR for comfirmation.

To replace the o-ring, get one the same size and cut it, then join together with super glue. I'm going to do this with the set up i am making for my oil pressure gauge.

Kevin

Did you really get this to work Kevin? I had the same problem on my Bomber and it keeps shearing the new o-ring at the superglued joint....bit of a loss of what to do now although someone suggested "gorilla glue"?!

Sam Green Racing · « **Reply #535 on:** January 21, 2010, 07:42:33 AM »

Try staples

ttr400 · « **Reply #536 on:** January 21, 2010, 10:10:48 AM »

Welcome back Simon, hope you are recovering from your op OK. finally got my new rims delivered to the shipper so should have them soon with the exhaust you sent....can't wait to get them in my hands.

I have not tried it myself yet, but i know some one that did and it seemed to work OK, I do know he used an O-ring specific glue. Could have been the Locktite brand or best Loc brand. I will try it and report back if it works.

Kevin

Ricky_Racer · « **Reply #537 on:** January 21, 2010, 10:18:55 AM »

This looks like the ticket. It's a little pricey; not that that will slow down some of you "landed gentry."

RR

http://www.shoplet.com/Loctite-O-Ring-Making-Kits-00112/SEPTLS44200112/spdv

ttr400 · « **Reply #538 on:** January 21, 2010, 10:45:21 AM »

That's it. Or for just the adhesive.

http://www.eriks.co.uk/adhesives/eriks.asp?title=Loctite-406-Adhesive&pageid=1001

Kevin

lordmoonpie · « **Reply #539 on:** January 21, 2010, 11:58:54 AM »

Thanks guys - that looks like just the ticket. If I can get a bus load of toursits around the old stately pile on Sunday afternoon it should just about pay for that

Sam - I've just about had enough of staples for a while

lordmoonpie · « **Reply #540 on:** January 23, 2010, 07:51:59 AM »

Got one on ebay today - sold for £20 where the list price is over £80! Bargain and now I can make gaskets for those leaky old CR31s on my CR750 - woo-hoo!

City Boy · « **Reply #541 on:** February 03, 2010, 06:47:29 AM »

Hi guys.I have some info to add re CR's that made it to Canada.I worked for Nelson Motorcycles in Toronto in 1970.I bought my k0 that year and witnessed the arrival of the CR kit to the shop that was built into a race bike,overseen by mechanic Dwight Teague.This machine was ridden by the then Mike Duff and holds the lap record of the now closed Harewood Acres circuit.A complete CR engine also arrived at some point however I never saw it apart.Tom Faulds was a close friend of John Nelson and was the National Service Manager of Canadian Honda,later a corporate V.P. and my employer 75'-77'. Rock On

Sam Green Racing · « **Reply #542 on:** February 03, 2010, 07:16:00 AM »

Sam.

voxonda · « **Reply #543 on:** February 03, 2010, 08:17:32 AM »

Quote from: City Boy on February 03, 2010, 06:47:29 AM

Hi guys.I have some info to add re CR's that made it to Canada.I worked for Nelson Motorcycles in Toronto in 1970.I bought my k0 that year and witnessed the arrival of the CR kit to the shop that was built into a race bike,overseen by mechanic Dwight Teague.This machine was ridden by the then Mike Duff and holds the lap record of the now closed Harewood Acres circuit.A complete CR engine also arrived at some point however I never saw it apart.Tom Faulds was a close friend of John Nelson and was the National Service Manager of Canadian Honda,later a corporate V.P. and my employer 75'-77'. Rock On

Man I can read these stories over and over! Thanks

Rob

kos · « **Reply #544 on:** February 18, 2010, 02:33:47 PM »

I have been asked to find a buyer for this...the last bike that Bob Hansen built. Bob was man responsible for Mr Honda's Honda's decision to build the Honda CB750 as a four cylinder. It was to be a BIG TWIN...until Bob sat with Mr Honda at a meeting in Japan. Bob was know for his Team Hansen G50's that were painted orange and won most races entered. He also had Honda R&D build him 3 CR450's to be raced at Daytona in 1967. He masterminded the Dick Mann winning effort at Daytona in 1970. Bob also helped American become established in early 60's.

Please contact me if you are interested in this rare piece.

KOS

E-Mail mark@m3racing.com

napoleonb · « **Reply #545 on:** June 23, 2010, 05:43:52 AM »

I haven't introduced myself to this forum but I'm building a CB750R replica myself.
You can follow the build on the Dutch website http://www.motor-forum.nl/forum/list_messages/217939/Dick-Mann-replica-1.html
Already two years into the build i keep on discovering bits and pieces that a proper CR replica should have.
With the lack of money to buy as many original parts as i can i am forced into building most parts myself.

I will recieve some parts from Lordmoonpie shortly, wherefore my gratitute, so i can put together the front end.
The base was a K7, completly wrong as i discovered after a few months, but i am currently changing some earlier decisions.

My question is:
Does anybody know the dimensions for the frontlegs (aluminium lower ones) from the kit cr?
The dimensions where i am specificly searching for are: Outer diameter, total length and center to center distance for the 4 bolts with wich the front axle is held in place. I am assuming these are M6 ?

Note the difference between the pics, the latter being the front legs wich are on the French Daytona bike.

City Boy · « **Reply #546 on:** June 23, 2010, 09:22:25 AM »

Hi.The lower 4 bolt cap legs you show are I believe the works magnesium units.The kit forks I have on my unit.They are the same lowers as used on K0 street units.The stanchions are same internally as street units but are one inch longer than stock for the 18" front wheel that was used and are also chrome plated top to bottom as opposed to street units that were only plated up to the headlight ears.At one point I had a set of works forks that were unsuitable for stock frame as they were much shorter than even the CB units.They were quite a piece though having the aforementioned mag lowers and titanium stanchions and lower tree. Rock On

lordmoonpie · « **Reply #547 on:** June 25, 2010, 04:26:21 AM »

Quote from: napoleonb on June 23, 2010, 05:43:52 AM

I haven't introduced myself to this forum but I'm building a CB750R replica myself.
You can follow the build on the Dutch website http://www.motor-forum.nl/forum/list_messages/217939/Dick-Mann-replica-1.html
Already two years into the build i keep on discovering bits and pieces that a proper CR replica should have.
With the lack of money to buy as many original parts as i can i am forced into building most parts myself.

I will recieve some parts from Lordmoonpie shortly, wherefore my gratitute, so i can put together the front end.
The base was a K7, completly wrong as i discovered after a few months, but i am currently changing some earlier decisions.

My question is:
Does anybody know the dimensions for the frontlegs (aluminium lower ones) from the kit cr?
The dimensions where i am specificly searching for are: Outer diameter, total length and center to center distance for the 4 bolts with wich the front axle is held in place. I am assuming these are M6 ?

Note the difference between the pics, the latter being the front legs wich are on the French Daytona bike.

Welcome on board Nap and I'm pleased to be able to help your project out! Now if only I could understand what you and Rob have been talking about on that Dutch forum link

napoleonb · « **Reply #548 on:** June 25, 2010, 08:09:56 AM »

Hi Simon,

Well just the regular chit chat about original parts, and how to recognize them.
I'll try posting in English the next time so you can read along.

I was wondering if anybody had a database of original parts with specifics and measurements.
I have a partslist for a CR750 kit version but i can not help to think that some parts are missing in this list.
Back in Holland i am a teacher in mechanical engineering and engineering. I work for my proffesion with Autodesk Inventor and am trying to put as many original parts as possible in this 3d CAD program. Just got over 550 different parts wich i have already drawn. (With some parts i had to smuggle a bit because they are quite difficult to draw and measure)

Still looking for accurate dimensions the frontlegs and tank fillercap.

lordmoonpie · « **Reply #549 on:** July 01, 2010, 10:52:07 AM »

Some of you guys have been asking for a repost of this Cycle World article but it won't let me becasue it's 1.2Mb and as it's a PDF I can't reduce that. So Mr Moderator Samwise Green - what can we do to twist the rules and allow me to post this up? hMMMMM?

News:

Author Topic: The 1970 Daytona CR750s. (Read 267105 times)