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Offline voxonda

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Re: New engine build
« Reply #25 on: July 18, 2009, 11:59:02 AM »
Quote from: MCRider on July 18, 2009, 11:05:44 AM
Quote from: voxonda on July 18, 2009, 10:58:57 AM
Waiting for my M3 camchain guide so am setting up the extra chainguide for the primary's against the uppercase. In doing so hoping to give the chains and tensioner a 'happier' life.
Anyone ever did something like that?
Sounds cool! A stock tensioner mounted in the top case? Let us see!

Hey MC,
No, am not going that far but a extra guide mounted against the top casing. Together with the stock tensioner with a bit more tension on the spring. So not a tensioner but a guide mounted in the topcase.
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Offline MCRider

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Re: New engine build
« Reply #26 on: July 18, 2009, 02:19:48 PM »
Quote from: voxonda on July 18, 2009, 11:59:02 AM
Quote from: MCRider on July 18, 2009, 11:05:44 AM
Quote from: voxonda on July 18, 2009, 10:58:57 AM
Waiting for my M3 camchain guide so am setting up the extra chainguide for the primary's against the uppercase. In doing so hoping to give the chains and tensioner a 'happier' life.
Anyone ever did something like that?
Sounds cool! A stock tensioner mounted in the top case? Let us see!

Hey MC,
No, am not going that far but a extra guide mounted against the top casing. Together with the stock tensioner with a bit more tension on the spring. So not a tensioner but a guide mounted in the topcase.
I see. Still a cool idea. Anything to reduce the whip effect has to help.
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Offline voxonda

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Re: New engine build
« Reply #27 on: July 29, 2009, 01:27:56 PM »
Quote from: mec on July 01, 2009, 01:36:27 PM
hi,
can you make a picture of the M3 cc tensioner, please?

mec

Hey mec,

Here is one.

Took awhile, M3 was out of stock, but very glad is has arrived. Thanks Mark.
« Last Edit: July 30, 2009, 02:34:53 PM by voxonda »
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Offline Sam Green Racing

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Re: New engine build
« Reply #28 on: July 29, 2009, 07:27:34 PM »
Quote from: voxonda on June 28, 2009, 10:56:28 AM
Finally start to build the 850 engine. Made arrangements to lighten the crank, new primary's with extra guide and more tension. Stronger camchain with M3 tensioner.
Can anyone tell me the gear ratio's used in the CR kit close-gearbox? Will not go that far but plans are to change 1st gear from 2.500:1 into 1.954:1

Thanks.

Rob
 



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   Re: The 1970 Daytona CR750s.
« Reply #360 on: March 19, 2009, 11:26:10 am » Quote 

--------------------------------------------------------------------------------
Nova vs Kit (970) box

CR750
1st 24/41 1.708
2nd 27/38 1.407
3rd 30/36 1.200
4th 31/33 1.065
5th 34/31  .912

NOVA
1st 18/37 2.056
2nd 22/33 1.500
3rd 25/31 1.240
4th 31/33 1.065
5th 32/31  .969


FYI... F2 Engines have ratio changes on 4th and 5th and that can work well on a road racer. Most street bikes have very high overdrive ratios in top gears and this is always hard to overcome when areo loads are highest and engine cannot be run in "sweet spot" of power curve.

KOS
 
Sam. ;)
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Offline Sam Green Racing

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Re: New engine build
« Reply #29 on: July 29, 2009, 08:06:58 PM »
Stock figures.

Prim. Red.:  1.708  1.708   1.708             
Sec. Red.:  1.167    
Final. Red.:  2.667  2.667  2.667  
Gear Ratio 1st:  2.5  2.5  2.5  
Gear Ratio 2nd:  1.708  1.708  1.708           78 K and F
Gear Ratio 3rd:  1.333  1.333  1.333  
Gear Ratio 4th:  1.097  1.097  1.097               1.133
Gear Ratio 5th:  0.939  0.939  0.939               0.969


Sam. ;)
« Last Edit: July 29, 2009, 09:47:25 PM by Samcr750 »
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Offline voxonda

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Re: New engine build
« Reply #30 on: July 30, 2009, 02:36:58 PM »
Hey Sam,

Thanks you're a great source of info. Think I leave the box as is for now.
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Offline mec

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Re: New engine build
« Reply #31 on: July 31, 2009, 12:33:16 AM »
Quote from: voxonda on July 29, 2009, 01:27:56 PM
Quote from: mec on July 01, 2009, 01:36:27 PM
hi,
can you make a picture of the M3 cc tensioner, please?

mec

Hey mec,

Here is one.

Took awhile, M3 was out of stock, but very glad is has arrived. Thanks Mark.

thank you.
seems that there is no roller, but a movable (swinging) teflon guide?!

mec
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Offline voxonda

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Re: New engine build
« Reply #32 on: July 31, 2009, 12:51:20 AM »
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
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Offline MRieck

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Re: New engine build
« Reply #33 on: July 31, 2009, 04:26:57 AM »
Quote from: voxonda on July 31, 2009, 12:51:20 AM
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
It makes the engine much quieter. Be sure to use it with a flat link cam chain.
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Offline voxonda

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Re: New engine build
« Reply #34 on: July 31, 2009, 05:22:51 AM »
Quote from: MRieck on July 31, 2009, 04:26:57 AM
Quote from: voxonda on July 31, 2009, 12:51:20 AM
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
It makes the engine much quieter. Be sure to use it with a flat link cam chain.

Thanks Mike,

I always use the Tsubaki Camellia, this is the first time I use the tensioner.

Rob
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Offline MCRider

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Re: New engine build
« Reply #35 on: July 31, 2009, 05:54:10 AM »
Quote from: voxonda on July 31, 2009, 05:22:51 AM
Quote from: MRieck on July 31, 2009, 04:26:57 AM
Quote from: voxonda on July 31, 2009, 12:51:20 AM
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
It makes the engine much quieter. Be sure to use it with a flat link cam chain.

Thanks Mike,

I always use the Tsubaki Camellia, this is the first time I use the tensioner.

Rob
Ah simplicity I like it, elegance of design.
So now the question for me is... will this style tensioner hold up in a 50k mile (80km  ;D) touring bike? Or is it for an engine that is routinely torn down for inspection?
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Offline voxonda

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Re: New engine build
« Reply #36 on: July 31, 2009, 06:00:44 AM »
Hey Ron,

With my experience with Nylon guides and a flat link chain, we use miles and miles of them in the factory I work, for transport purposes and the fact that these chains have no grease, or very, very little, what so ever, due to regulations for food packaging I'd say it should be good. Though the forces at a lot less, they keep running and running and runn............................... One of the most important issue is to use the right chain, so no OEM style link, because these act as a saw!! The forces are carried by a much smaller contact surface.

Rob
« Last Edit: July 31, 2009, 06:03:02 AM by voxonda »
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Offline Sam Green Racing

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Re: New engine build
« Reply #37 on: August 03, 2009, 01:45:13 PM »
Quote from: MRieck on July 31, 2009, 04:26:57 AM
Quote from: voxonda on July 31, 2009, 12:51:20 AM
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
It makes the engine much quieter. Be sure to use it with a flat link cam chain.

Hey Mike, do they all need that little mod that you did on the one for me ? (shortened tube spacer)

Sam. ;)
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Offline voxonda

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Re: New engine build
« Reply #38 on: August 03, 2009, 02:05:02 PM »
 ??? ??? ??? ??? Please tell, wanna learn.
« Last Edit: August 03, 2009, 02:18:55 PM by voxonda »
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Offline voxonda

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Re: New engine build
« Reply #39 on: August 03, 2009, 02:28:46 PM »
BTW. received my main stud bolts today. 12.9 CrMo bolts with rolled threads, so that will be sufficient. So no need to wait on the Dynoman bolts. All the parts are falling into place before too long. So at last that torque strong engine in the replica.
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Offline DsKing416

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Re: New engine build
« Reply #40 on: August 03, 2009, 02:49:47 PM »
Don't wait for Dynoman order the cycle exchange HD bolts you'll have them in two days. They are higher quality anyway.
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Offline MCRider

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Re: New engine build
« Reply #41 on: August 03, 2009, 02:57:00 PM »
Quote from: DsKing416 on August 03, 2009, 02:49:47 PM
Don't wait for Dynoman order the cycle exchange HD bolts you'll have them in two days. They are higher quality anyway.
Does cycleX have the mains, or just the cylinder studs?

Its the mains (crankshaft) we're talking about here.
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Offline MCRider

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Re: New engine build
« Reply #42 on: August 03, 2009, 02:58:07 PM »
Quote from: voxonda on August 03, 2009, 02:28:46 PM
BTW. received my main stud bolts today. 12.9 CrMo bolts with rolled threads, so that will be sufficient. So no need to wait on the Dynoman bolts. All the parts are falling into place before too long. So at last that torque strong engine in the replica.

Rob: Bolts, not studs and nuts?

Will Voxonda.com be offering them?
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Offline Sam Green Racing

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Re: New engine build
« Reply #43 on: August 03, 2009, 03:40:28 PM »
Quote from: voxonda on August 03, 2009, 02:05:02 PM
??? ??? ??? ??? Please tell, wanna learn.

I'll ask Mike as he got one for me.

Sam. ;)
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Offline voxonda

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Re: New engine build
« Reply #44 on: August 03, 2009, 10:40:37 PM »
Quote from: MCRider on August 03, 2009, 02:58:07 PM
Quote from: voxonda on August 03, 2009, 02:28:46 PM
BTW. received my main stud bolts today. 12.9 CrMo bolts with rolled threads, so that will be sufficient. So no need to wait on the Dynoman bolts. All the parts are falling into place before too long. So at last that torque strong engine in the replica.

Rob: Bolts, not studs and nuts?

Will Voxonda.com be offering them?

Hey, MC

Yes, voxonda.com will.

Cheers,

Rob
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Offline MRieck

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Re: New engine build
« Reply #45 on: August 04, 2009, 05:02:29 AM »
Quote from: SamCB750A on August 03, 2009, 01:45:13 PM
Quote from: MRieck on July 31, 2009, 04:26:57 AM
Quote from: voxonda on July 31, 2009, 12:51:20 AM
Yes, correct. No moving parts. Looks to me that it benefit engine 'noise' reduction a bit.

Rob
It makes the engine much quieter. Be sure to use it with a flat link cam chain.

Hey Mike, do they all need that little mod that you did on the one for me ? (shortened tube spacer)

Sam. ;)
You don't need to run that spacer Sam (at least that's what McGrew says now).
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Offline voxonda

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Re: New engine build
« Reply #46 on: October 31, 2009, 05:25:14 AM »
At last, found time to do the crank, so just some polishing and balancing to do.


Think it will all fall down into place one of these days, together with the dry clutch.



Rob
« Last Edit: October 31, 2009, 05:58:40 AM by voxonda »
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Offline H2Eric

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Re: New engine build
« Reply #47 on: November 01, 2009, 02:49:05 AM »
Quote from: voxonda on June 28, 2009, 10:56:28 AM
Finally start to build the 850 engine. Made arrangements to lighten the crank, new primary's with extra guide and more tension. Stronger camchain with M3 tensioner.
Can anyone tell me the gear ratio's used in the CR kit close-gearbox? Will not go that far but plans are to change 1st gear from 2.500:1 into 1.954:1

Thanks.

Rob
 

Hi Rob

Hopefully I have the info you requir with respect to the gear ratios.
From an original K2 sales leaflet the ratios are:
1st   2.500
2nd  1.708          Primart reduction = 1.708
3rd  1.333          Final reduction = 2.667 (drive sprocket 18T, rear sprocket 48T)
4th  1.097
5th  0.939

Cycle Magazine  (October 1970) quotes the ratios as follws
Standard Ratios
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Offline voxonda

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Re: New engine build
« Reply #48 on: November 01, 2009, 07:34:56 AM »
Thanks Eric,

After much consideration and advice from Sam I stay with the standard box. The engine I use is F1 and has other ratio's for 4th and 5th.

4th 1.133:1
5th 0.969:1

The opinion is that 1st and 2nd will be to close.

Regards, Rob
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Offline H2Eric

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Re: New engine build
« Reply #49 on: November 01, 2009, 09:09:52 AM »
My post seems to have got the chop part way through. I also lost the conection to the forum at the same time. However, glad to know you got all the info you require.

Regards
Eric
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