Post by: Laverdaroo on November 06, 2021, 11:18:11 AM
I’m not sure if there’s anything I don’t like about it. What a little screamer and fantastic execution. I can only get one photo at a time on here from my phone so I’ll do a couple of posts but this, sadly is the whole article. Enjoy
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Post by: Laverdaroo on November 06, 2021, 11:19:33 AM
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Post by: Laverdaroo on November 06, 2021, 11:19:55 AM
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Post by: Laverdaroo on November 06, 2021, 11:20:20 AM
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Post by: Laverdaroo on November 06, 2021, 11:20:55 AM
This months Practical Sportsbike has a small but picture filled double page spread on this little cracker.
I’m not sure if there’s anything I don’t like about it. What a little screamer and fantastic execution. I can only get one photo at a time on here from my phone so I’ll do a couple of posts but this, sadly is the whole article. Enjoy
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Sent from my iPhone using Tapatalk
Post by: Laverdaroo on November 06, 2021, 11:21:26 AM
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Post by: andy120t on November 06, 2021, 01:56:01 PM
Is that the standard tank, but shortened and with something - electrics?- under a new rear section?
Post by: Laverdaroo on November 06, 2021, 01:59:03 PM
Post by: K2-K6 on November 06, 2021, 02:30:01 PM
Honda endurance racer, late seventies one of my favourites
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This one 750 sohc based.
Post by: K2-K6 on November 06, 2021, 02:34:42 PM
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Great looking bikes.
Post by: K2-K6 on November 06, 2021, 02:37:22 PM
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Post by: Laverdaroo on November 06, 2021, 03:04:13 PM
Post by: Rozabikes Tim on November 06, 2021, 03:38:42 PM
(https://uploads.tapatalk-cdn.com/20211106/2a36d7f50c2d174209a82204a291a4e6.jpg)
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Think the phrase is "sex on a stick!"
Post by: SumpMagnet on November 06, 2021, 04:33:23 PM
I have been working on EXACTLY the same fibreglass tank extension idea for my 750. For exactly the same reason.
but I was making mine as a little storage thing to hold waterproofs etc.
I took an initial pattern from the back of the tank.....and laid up a fibreglass thing on the inside of the mould. It;s too wide....so I needed to cut it in half, narrow it...and then rejoin it.
Been considering buying a knackered tank to redo it in steel, but even the ruined ones are expensive.
Still...at least it proves the idea worked, but I have been beaten to it :)
Post by: Laverda Dave on November 06, 2021, 05:08:54 PM
Nigel, was the original endurance racer based on a cb750sohc with a dohc top end?
Post by: K2-K6 on November 06, 2021, 10:55:29 PM
The 400 is absolute class, up to 65bhp from a motor originally producing 37bhp is an amazing hike in performance. The clutch looks really trick.
Nigel, was the original endurance racer based on a cb750sohc with a dohc top end?
Yes that 400 is fabulous, apologies to laverdaroo for way laying the thread. That era (I call it, last of the black steel frame race period) gave us some lovely design and individual styling I feel. Looks like the 400 is using original frame too.
Yes Dave, the RCB was effectively the final development of the original SOHC 750 motor with a barrel and twin cam 16 valve head assembly on increased bore to make that motor. Note the crankcase is the same but missing the ignition placement casting area, but wet std clutch cover and still with kickstart fitted.
They also mounted the alternator on top of gearbox to slim it overall, and notice in the first picture it's fitted with clear float bowls to carbs to give easy fault finding in endurance racing.
They did make one with gear primary drive too, uses an idler between crank and gearbox to keep everything going in the same direction as a chain would.
The CB900 twin cam took over in race use as an adaptation of next production design from this RCB iteration. Although you can see most of this first RCB layout mirrored in the CBX 750 motor design that came early eighties. Also why it's popular in Japan for making RCB type retro bikes. Easily into the 90s bhp wise too with a big twostroke type powerband kick to it.
Post by: Laverdaroo on November 07, 2021, 01:20:18 PM
Post by: Laverda Dave on November 07, 2021, 08:51:34 PM
Talking of hotted-up 400’s, Frank has a Harrier on sale in his shop in Perivale, I think it's in the £8-10k range. I think it may be a replica, it has CR carbs fitted.
Post by: K2-K6 on November 08, 2021, 07:11:17 PM
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:D
Post by: MrDavo on November 08, 2021, 09:34:18 PM
We were in the ex Post Office Depot in Douglas, which was open to various Honda riders as well as the BSB team, one hazard was crazy Aussies and New Zealander’s who thought it was OK to fly a remote control petrol powered helicopter around while we were trying to work. I was worried about becoming shredded if anything went wrong.
We also had the bare bones of a works 250 four from the Japanese domestic championship, that Bill Simpson spent a lot of time prepping for his son, Ian to ride. In the event the weather was so bad that it wasn’t ridden, Ian was probably only half joking when he suggested I rode it instead using his number. Joey won that race, quite unfazed by rivers running across the track. I went out with his mechanics and came back at dawn absolutely blotto.
Post by: K2-K6 on November 08, 2021, 10:11:13 PM
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Some second hand available too https://www.amazon.co.uk/Complete-Book-Endurance-Racing-Ride/dp/0854292535
It's all those details that go into these works/development bikes I find facinating as you note Mr Davo, nice to get a view of one like that close up.
Post by: K2-K6 on November 08, 2021, 10:29:02 PM
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Into the 90 BJP range as a 750, it came quite close to a real rcb which ran about 105 BJP from larger capacity. Rumour was development was insurance policy if the new V4 Bikes failed in market.