Author Topic: Building of a CB500 classic racer  (Read 207437 times)

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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #575 on: September 02, 2011, 10:42:30 AM »
These are the guys on the fastest bikes , 60 hp at the rearwheel and a weight of a 110-113 kg.
Absaf has many engines with different tuning , these guys have the most fast engines.
The guy on the yellow/blue is the champion , he won already four classic titles and rode 250 , supersport 600 , Bott and Supermono.
« Last Edit: September 02, 2011, 10:45:56 AM by Howell »
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #576 on: September 02, 2011, 10:50:17 AM »
This year is the Suzuki T500 allowed , there is one rider now with such a bike.
This bike is incredible fast , 80 hp rwp, but was not always  reliable.
« Last Edit: September 02, 2011, 10:57:06 AM by Howell »
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Offline bwaller

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Re: Building of a CB500 classic racer
« Reply #577 on: September 02, 2011, 11:29:00 AM »
That engine is almost bulletproof until one more than doubles its horsepower. I wonder what the final weight of it is. I seriously considered one as my race project.....until I considered what the cost would be.  ::)

Offline Howell

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Re: Building of a CB500 classic racer
« Reply #578 on: September 03, 2011, 11:42:43 AM »
Somebody interested in a ABSAF engine, it's a bargain  ;D:
http://classifieds.classic-motorrad.de/classifieds/detail.php?siteid=23153

We made a complete Cb500 racer for the prise of that ABSAF engine. :)
« Last Edit: September 03, 2011, 11:46:07 AM by Howell »
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #579 on: September 08, 2011, 11:59:27 AM »
This is the new Nico Bakker chassis for the CB500, very expensive.
Chassis and swingarm with tank and seat , price nearly € 7000,=  or $ 9800,= 
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Offline CB750faces.com (Lecram)

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Re: Building of a CB500 classic racer
« Reply #580 on: September 09, 2011, 12:21:20 AM »
This is the new Nico Bakker chassis for the CB500, very expensive.
Chassis and swingarm with tank and seat , price nearly € 7000,=  or $ 9800,= 

With that frame you will gain seconds! Nice rear shocks ;)



Offline Howell

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Re: Building of a CB500 classic racer
« Reply #581 on: September 16, 2011, 10:14:44 AM »
Ordered this week a Davies chassis:

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Offline Greggo

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Re: Building of a CB500 classic racer
« Reply #582 on: September 16, 2011, 10:21:21 AM »
Wow, that's beautiful!

Offline Howell

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Re: Building of a CB500 classic racer
« Reply #583 on: November 07, 2011, 10:51:27 AM »
Today I received a  'small'  box from the UK including a DM5004-10.
Comings weeks I have some work to do in my garage.
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Offline turboguzzi

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Re: Building of a CB500 classic racer
« Reply #584 on: November 08, 2011, 12:31:50 AM »
looks good rene!

lets see how many seconds a lap it is worth... :)

keep us updated on the build

TG

Offline bwaller

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Re: Building of a CB500 classic racer
« Reply #585 on: November 08, 2011, 03:58:06 AM »
This vintage racing is quite a disease, right Rene? Nice frame though. Are you building a complete new chassis?

My stock frame feels lonely!

Offline Howell

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Re: Building of a CB500 classic racer
« Reply #586 on: November 08, 2011, 11:38:36 AM »
I'm gonna build up the new frame with some parts from the old frame.
Such as the frontfork ,yokes, frontwheel with brake, rearwheelhub , rearsets ,rev counter ,shocks and fairing.
The idea is to build a carbon tank and seat.
Further we use new parts from Davies , a front fairing bracket , clip-ons, footrest hangers ,all made from very light aluminium and a carbon fibre chain guard.
Our target is to reduce the weight by 20 kg or even more.
The Davies frame weight is 10,5 kg including swingarm and swingarm axle.
The stock frame weight is 20 kg , so we saved already 9,5 kg at the frame.
I have already made some parts lighter such as the wheels axles , drilled them trough , new frontbrake brackets, drilled holes in the rearbrake panel and brake shoes.
Have made already many spacers and bushings from alumium instead of steel.
Instead of a 2.50 rearwheel rim we gonna use a smaller 2.15 rim , also lighter tyres.
Frontwheel a Dunlop KR825  instead of the Avon AM20 , rearwheel a Avon AM22 110/80-18 instead of the thick AM23 130/65-18.
And these tyres without a innertube , our friend with the blue Honda is doing this already for two years.
The weight reduce of the tyres and leaving away the innertubes and smaller rim is about 4kg.
Futhermore I am making another exhaust system , with a better gasflow.Therefore I use a pair of old CB500 header pipes , and a collector of a CBR600 and a carbon Leo Vinci SBK silencer.
Some pics:
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #587 on: November 21, 2011, 12:24:20 PM »
Last two weeks I made a lot of progress building up the bike.
But I discovered that Davies uses a shorter stearinghead tube as the original Honda ,they didn't told me that.
I had asked John before about all the differences between their frame and the Honda.
The delivered tapered stearinghead bearings had also a different size as original.
They use on all their  frames the same size stearinghead tubes, bearings and yokes.
Now I had a problem with our stearing stem which is 1 cm longer , I had some  email conversation about it with John Davies.
I didn't want to shorten the stem to make it fit , that was a possibility , but in case off a fall back to the old frame , we can use it again.
He offered me to pay a new stearing stem.
But after some measurements I decided to make two 5 mm spacers to fill up the gap and to order bearings with the right size.
I put one spacer under the lower bearing and one above the upper one, and that works.
Now I could build in the frontfork.
The 'cockpit'  is also finished.
Also I made many aluminium spacers ,bushings and lugs.
Yrjo is making a casting mould from foam for the carbonfibre fueltank now and later on the seat.
For this purpose he made first a cutting machine , made from a jigsaw with a resistance wire , a battery loader and an electric transformer.
 





« Last Edit: November 22, 2011, 10:51:29 AM by Howell »
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #588 on: November 21, 2011, 12:31:03 PM »
Making the fueltank casting mould by Yrjo:
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Offline turboguzzi

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Re: Building of a CB500 classic racer
« Reply #589 on: November 21, 2011, 01:42:56 PM »
looking good man!

are you sure you need all that tank capacity? looks like 20 liters... :) never needed more than 10L for our 20-25 mins races.

keep up the good work

TG

PS nice to have a heated garage... it's 3C in mine....

Offline Howell

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Re: Building of a CB500 classic racer
« Reply #590 on: November 22, 2011, 10:58:13 AM »
Tg,

We use an electric heater in our garage otherwise it's also very cold in it.
The tank is even some smaller as the tank we used before , but it's not the final shape at this moment.
The tank capacity will be about 10-12 liters , old tank capacity is 10 liters and that was evenso enough for our 25-30 mins races.
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #591 on: November 23, 2011, 11:17:33 AM »
The exhaust system is nearly finished , a friend of me will weld the parts together.
The silencer is  removable.
As I told before the collector is a 4 in 2 in 1 from a Honda CBR600F
« Last Edit: November 23, 2011, 11:30:48 AM by Howell »
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Offline kpier883

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Re: Building of a CB500 classic racer
« Reply #592 on: November 23, 2011, 11:32:45 AM »
Wow.  Never saw this thread before.  Now I am subscribed! 

I have a question about the gsxr1000 rods from page 1 of this post. 

What size was the small end hole for the wrist pin?  If it was larger than the wrist pin on your 500 pistons, did you have it sleeved (as it looks like you did) with a bronze insert?

Kind Regards,

Kirk

« Last Edit: November 23, 2011, 11:38:17 AM by kpier883 »
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #593 on: November 23, 2011, 12:47:54 PM »
Wow.  Never saw this thread before.  Now I am subscribed! 

I have a question about the gsxr1000 rods from page 1 of this post. 

What size was the small end hole for the wrist pin?  If it was larger than the wrist pin on your 500 pistons, did you have it sleeved (as it looks like you did) with a bronze insert?

Kind Regards,

Kirk



Wristpin hole normal size is 15mm , they are indeed sleeved with 13mm bronze inserts ,because we use pistons with a 13mm pin.
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Offline kpier883

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Re: Building of a CB500 classic racer
« Reply #594 on: November 23, 2011, 05:24:39 PM »
Is it difficult to machine the bronze sleeve? 

Do you mind sharing the clearance information of both the inside and outside of the bronze inserts?  That is, what clearance for the insert to the rod hole and what clearance for the wristpin to the bronze insert hole?

I assume the bronze insert should not turn (spin) inside the rod, correct?

As you can tell I don't know anything about machine work.  But I would like to know how you did that!

Kirk

 
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Offline Howell

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Re: Building of a CB500 classic racer
« Reply #595 on: November 24, 2011, 01:35:40 AM »
Is it difficult to machine the bronze sleeve? 

Do you mind sharing the clearance information of both the inside and outside of the bronze inserts?  That is, what clearance for the insert to the rod hole and what clearance for the wristpin to the bronze insert hole?

I assume the bronze insert should not turn (spin) inside the rod, correct?

As you can tell I don't know anything about machine work.  But I would like to know how you did that!

Kirk

 

I didn't made the inserts , our tuner , but they should for sure not turn inside the rod.
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Offline Sam Green Racing

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Re: Building of a CB500 classic racer
« Reply #596 on: November 24, 2011, 02:03:34 AM »
It's looking good Rene, It will be nice to see the finished product, keep it coming. 8)

Sam. ;)
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Offline classic bike tuner

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Re: Building of a CB500 classic racer
« Reply #597 on: November 24, 2011, 03:02:33 AM »
hallo kirk
the gsxr rods are in two types the 40F and the 41G
the 40 F pp hole wil be about 18mm after removing the stock insert
the 41G pp hole wil be about  17mm after removing the stock insert
for the bronze insert i use  cual10ni
outside dimension about 0,05 to 0,07 bigger
easy to machine  but expensive
inside clearance  0,01

Is it difficult to machine the bronze sleeve? 

Do you mind sharing the clearance information of both the inside and outside of the bronze inserts?  That is, what clearance for the insert to the rod hole and what clearance for the wristpin to the bronze insert hole?

I assume the bronze insert should not turn (spin) inside the rod, correct?

As you can tell I don't know anything about machine work.  But I would like to know how you did that!

Kirk

 

Offline Howell

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Re: Building of a CB500 classic racer
« Reply #598 on: November 24, 2011, 11:35:11 AM »
hallo kirk
the gsxr rods are in two types the 40F and the 41G
the 40 F pp hole wil be about 18mm after removing the stock insert
the 41G pp hole wil be about  17mm after removing the stock insert
for the bronze insert i use  cual10ni
outside dimension about 0,05 to 0,07 bigger
easy to machine  but expensive
inside clearance  0,01

Is it difficult to machine the bronze sleeve? 

Do you mind sharing the clearance information of both the inside and outside of the bronze inserts?  That is, what clearance for the insert to the rod hole and what clearance for the wristpin to the bronze insert hole?

I assume the bronze insert should not turn (spin) inside the rod, correct?

As you can tell I don't know anything about machine work.  But I would like to know how you did that!

Kirk

 

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Offline voxonda

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Re: Building of a CB500 classic racer
« Reply #599 on: November 24, 2011, 11:53:31 AM »
Be sure to keep that CuAl10Ni oiled! Is has no good 'dry run' characterisitics.
Better sorry for failing then for the lack of trying.