Author Topic: Bit of a rare CB250RS Deluxe  (Read 2030 times)

Offline AshimotoK0

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Re: Bit of a rare CB250RS Deluxe
« Reply #15 on: October 29, 2024, 04:20:07 PM »
Thank God we are civilised beings on here. Seller got a load of flak/negativity/insults when he listed it on Facebook 250RS group.

My only query was the bluing on the exhaust pipes. Looks a bit excessive .... I am not sure if down-pipes were double-skinned on that model. Laverda Dave will know.
« Last Edit: October 29, 2024, 04:22:36 PM by AshimotoK0 »
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Offline Laverda Dave

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Re: Bit of a rare CB250RS Deluxe
« Reply #16 on: October 30, 2024, 01:34:03 PM »
To my knowledge all Honda header pipes of this era were double skinned. Those pipes are very blue and I would be a bit concerned for the state of the engine especially the valves and cam bearings and lobe faces/rocker pads considering there is only just over 1 litre of oil in these motors and it gets very hot and works very hard with so little to go round. These engines always did run hot and the telltale was always rusty headers where they attach to the cylinder head ports due to the damage to chrome plate caused by excessive heat.
Considering the ultra low milage of this bike It could be running very lean or maybe it could be a case of the PO starting and running the engine without actually riding it.
The bidding so far is very high for what might be a rare and low milage example but I really would want to have a good look at that motor (and hear it) before I part with such a large wad of cash, hopefully that is what the bidder's are doing rather than bidding blind based on photos 🤔
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline Laverda Dave

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Re: Bit of a rare CB250RS Deluxe
« Reply #17 on: October 30, 2024, 01:51:31 PM »
Have I missed something, the bidding has ended with zero bids?
The start price of £3000 remains. Maybe it was bought off-line?
Just thinking about the history as well. The seller mentions the service book is stamped for the running-in service, how can this be when there is only 89 miles on the Speedo, who would get a first service at 89 miles? I would ride 89 miles within a couple of days on a new bike!
This leads me on to those blue header pipes, those pipes should not be that colour after only 89 miles, I can only assume the bike was either thrashed from day one (it was a learner after all), it has been running very lean or maybe (and considering the 89 mile first service) it may have been involved in an accident resulting in a replacement instrument console? Maybe I am adding 2+2 and coming up with 5 but something doesn't seem right here?
« Last Edit: October 30, 2024, 02:00:14 PM by Laverda Dave »
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline Arch stanton

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Re: Bit of a rare CB250RS Deluxe
« Reply #18 on: October 30, 2024, 03:26:16 PM »
I think the reason the exhausts are so blue is, that they are pattern items.
They certainly are not the pipes that was on the bike in the original
"As found"  photograph.

Offline Bryanj

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Re: Bit of a rare CB250RS Deluxe
« Reply #19 on: October 30, 2024, 04:47:23 PM »
First service was 500 miles or a set time if you read the book carefully, bit like escort cvh engines where people got upset the cambelt broke at 5 years but only 25,000 miles the book says 36,000 OR 3 years whichever comes first

Offline Laverda Dave

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Re: Bit of a rare CB250RS Deluxe
« Reply #20 on: October 31, 2024, 10:44:47 AM »
Similar to my Moto Morini Bryan, the cam belt must be renewed every 2 years despite the milage. Last time I renewed it I had only ridden just over 200 miles and these belts are expensive as they are individually hand picked! They are the same belt but have to be put on a jig to test for individual slack and are marked as A, B or C. Morini in their wisdom marked the cam and crankshaft gear wheels A, B or C. Put an A belt on a gear wheel marked B and it will be marginally too slack and the timing could be out.

Anyway, back to the thread, I think the comment made by Arch Stanton is correct, the bike on the ebay photo has a different set of headers compared to the 'as found' photos. I still cannot get my head around the 89 miles for the service though, when I was a learner I was out on the bike every moment I could get and 89 miles would be completed within a day or two.
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline McCabe-Thiele (Ted)

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Re: Bit of a rare CB250RS Deluxe
« Reply #21 on: October 31, 2024, 11:44:48 AM »
I doubt it applies to Classic Bike parts, modern car cambelt materials/construction  have improved massively since 1984 when my Astra 1600SR (could not afford a GT/E) needed a belt change every 40k miles iirc.

Quite a few manufacturers are now 10 years or 100,000 miles today provided they are not contaminated with oil.
The tensioner wheels or water pumps often start to fail first.


On topic
The first photo I saw the headers looked pimpled with rust as you would expect.
Could it be some clever Photoshop technology at work?
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https://www.sohc.co.uk/index.php/topic,28541.0.html
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Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Bryanj

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Re: Bit of a rare CB250RS Deluxe
« Reply #22 on: October 31, 2024, 02:47:28 PM »
Have you noticed Ford have dropped the recommended mileage change for their "wet belt" engines by quite a bit, when i picked up my new L200 21 yrs ago on a friday it was booked in for 1st service next monday(3days) trip to family oop north and 600 miles later-----

 

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