B25 Sprint bike...

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B25 Sprint bike...

Postby sprinter » Wed Jul 20, 2016 8:57 pm

Engine finished today,,,,hopefully get it in the bike tomorrow evening !!!
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Re: B25 Sprint bike...

Postby sprinter » Wed Jul 20, 2016 8:59 pm

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Re: B25 Sprint bike...

Postby sprinter » Wed Jul 20, 2016 9:04 pm

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Re: B25 Sprint bike...

Postby sprinter » Sat Jul 23, 2016 8:53 am

Engine back in bike and all plumbing done !!!!
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Re: B25 Sprint bike...

Postby Ian Hingley » Sat Jul 23, 2016 10:41 am

:thumb

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Re: B25 Sprint bike...

Postby sprinter » Sat Jul 23, 2016 1:05 pm

Cheers Ian

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Re: B25 Sprint bike...

Postby beat » Sat Jul 23, 2016 8:59 pm

:thumb :thumb

like it, beat

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Re: B25 Sprint bike...

Postby sprinter » Sun Jul 24, 2016 9:16 pm

Finally ready.....
sprint.jpg

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Re: B25 Sprint bike...

Postby David S » Sun Jul 24, 2016 10:51 pm

Nice job! It sure looks quick! :cool: :grin:

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Re: B25 Sprint bike...

Postby HPbyStan » Mon Jul 25, 2016 4:09 am

Sure looks impressive, hope there's a minimum of bugs to work out. Nice job !

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Re: B25 Sprint bike...

Postby sprinter » Mon Jul 25, 2016 8:26 am

Thanks David and Stan,

Will let you know as soon as I have run it !

Just waiting for an Oil Pressure Valve from forum member Lathejack before I run the engine.

Jon

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Re: B25 Sprint bike...

Postby AJ CCM » Mon Jul 25, 2016 9:02 am

Lovely Job :thumb
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Re: B25 Sprint bike...

Postby Mark Cook » Mon Jul 25, 2016 5:03 pm

Looks the part, but sooner you than me.
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Re: B25 Sprint bike...

Postby sprinter » Mon Jul 25, 2016 6:49 pm

We wont be seeing you sprinting any time soon then Mark ? lol

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Re: B25 Sprint bike...

Postby AJ CCM » Mon Jul 25, 2016 9:59 pm

Hope you don't have to break quick
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Re: B25 Sprint bike...

Postby sprinter » Tue Jul 26, 2016 7:42 am

Why ??

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Re: B25 Sprint bike...

Postby AJ CCM » Tue Jul 26, 2016 9:28 am

sprinter wrote:Why ??


It could be painfull
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Re: B25 Sprint bike...

Postby sprinter » Tue Jul 26, 2016 9:54 am

LOL.....!!!

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Re: B25 Sprint bike...

Postby Mark Cook » Tue Jul 26, 2016 10:13 am

I have a fear of speed and heights, so nothing fast or high. Hence I wobble around doing mx. After a close encounter of the Ford Focus I'm not keen on the road either.
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Re: B25 Sprint bike...

Postby sprinter » Tue Jul 26, 2016 12:39 pm

Sprinting might suit you then Mark....

Its low to the ground,
You go as fast as you want,
...and you are not likely to meet any cars !!!
Perfect.

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Re: B25 Sprint bike...

Postby skippy » Tue Jul 26, 2016 11:38 pm

sprinter wrote:Sprinting might suit you then Mark....

Its low to the ground,
You go as fast as you want,
...and you are not likely to meet any cars !!!
Perfect.

I just love the Perspective you can place on things :laugh :laugh
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Re: B25 Sprint bike...

Postby sprinter » Thu Aug 04, 2016 6:35 pm

Finally found time to start and run the bike today.....

Couldnt believe it when it started 2nd kick and sounded like B25 on steroids !!

I ran a tank of methanol through it and changed the oil after while the oil was still warm.....all looks great.
I am using Rock Oil TRM Synthetic 20W 60.

The Amal MK2 has a 500 main jet in.....looks like i will need to go bigger as the plug was barely wet after running.(NGK B8EG)

Once the engine is warm and off of the cold start lever, it idles happily....I didnt imagine it would with a big 32mm Carb on a B25...

Throttle response off of idle is superb.....I am more than a bit surprised....but also more than a bit HAPPY !!!

I have 4 gears and neutral too...they seem to engage positively with no fuss !

I had the clutch pressure plate hard anodized by a local company and fitted 6 fibre plates in....NO clutch slip to date and a nice light lever.

I will post a little video with sound tomorrow if I can get it downloaded on here ok.

Thanks to all who contributed to the build both in parts and advice.

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Re: B25 Sprint bike...

Postby beat » Thu Aug 04, 2016 8:04 pm

sounds good !!!

wonder how fast it will be....
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Re: B25 Sprint bike...

Postby sprinter » Thu Aug 04, 2016 9:27 pm

...my ambition was always to have a 100mph B25 !! LOL <216

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Re: B25 Sprint bike...

Postby sprinter » Thu Aug 04, 2016 9:41 pm

beezer.jpg

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Re: B25 Sprint bike...

Postby HPbyStan » Fri Aug 05, 2016 1:08 am

Did You get the updated oil pressure relief valve from Lathejack installed ?

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Re: B25 Sprint bike...

Postby sprinter » Fri Aug 05, 2016 8:12 am

Yes Stan.....it took about 5 minutes to fit and works perfectly.
Threads were perfect.
(Just had to drill a wire locking hole in the top hex)
I messaged Gene to let him know....
Essential for 69 type engines !!

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Re: B25 Sprint bike...

Postby sprinter » Fri Aug 05, 2016 8:19 am

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Re: B25 Sprint bike...

Postby AJ CCM » Fri Aug 05, 2016 11:52 am

Jon
Just needs a b50.org sticker on the bike now. <216
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Re: B25 Sprint bike...

Postby sprinter » Fri Aug 05, 2016 1:16 pm

Good idea.....does anyone have one they can send me ?

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Re: B25 Sprint bike...

Postby koncretekid » Sat Aug 06, 2016 5:04 pm

sprinter wrote:Good idea.....does anyone have one they can send me ?


If anybody on this side of the pond has them,I could use a couple - - for the trailer as well as the bike.

I'd get some made, but I've just been too busy rebuilding and entertaining 3 kids and their partners and 4 grandchildren, nieces, etc, not to mention rebuilding the jet drive on my boat, and buying and setting up a new trailer as my old one rusted out and won't pass inspection.

P.S. When I grow up, I'm going to build a B25 motor for my land speed bike!

Tom
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Re: B25 Sprint bike...

Postby sprinter » Sat Aug 06, 2016 5:40 pm

Nice one Tom,

I am certainly impressed with what you can do to a B25 to make it go well !!!

Jon

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Re: B25 Sprint bike...

Postby sprinter » Sat Aug 06, 2016 5:45 pm

Does anyone have a www.b50.org logo in electronic format please ?
Thanks
Jon

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Re: B25 Sprint bike...

Postby madmac » Sat Aug 06, 2016 8:35 pm

Don't have a sticker and I don't have a B50 but what I do have a primary b50org cover for my B25T
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Primary case
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Re: B25 Sprint bike...

Postby Barry Creary » Sat Aug 06, 2016 10:48 pm

image.jpeg
image.jpeg
image.jpeg


It's a bit hard to see but the is a sticker and post card Rickard sent me when I first got to know of his forum. Maybe he could help with some sort of electronic pattern <201

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Jack Gifford
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Re: B25 Sprint bike...

Postby Jack Gifford » Sun Nov 13, 2016 7:34 am

I have to confess my ignorance of "sprint" events in your country. I just recently read about them beginning in 1905 (in Brighton?). All this time I thought we colonials originated and popularized dragracing. :oops:
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Re: B25 Sprint bike...

Postby hwan » Sun Nov 13, 2016 11:56 am

JACK -
A 'Sprint' in the UK is basically one bike against the clock, set off when you are ready - no reaction to lights required.

Doesn't have to be 1/4 mile, thees many 1/8 miler's, i think Brighton is one as is IOM.

Also don't have to be straight line - there are several 'twisty Sprints' - New Brighton & Curborough being a couple i can think of.

All are on tarmac.

If its up a hill - it becomes a 'Hill-climb' - again on Tarmac, though there are plenty of off-road Hill-climbs but usually not as radical as the ones in the USA.

RED-MARLEY - a famous off-road hill-climb with FOUR entrants against each other, i think the 1st two get carried over to the next round on a knock-out system. Very, very entertaining with the hill increasing in steepness at the finish line....

Sprinting on places like Brighton pier and IOM, originated because any form of motor-racing on public roads were banded very early in the UK (requiring an act of Parliament to close roads, etc.
What became Formula One was virtually a French monopoly in the early 1900's simply because they continued to allow road racing and judging by the the way they happily close large sections of road for push-bike racing, they can still easily do this.

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Re: B25 Sprint bike...

Postby Chris Pellett » Wed Nov 16, 2016 3:39 pm

I like the idea of a sprint on Brighton Pier, but it's actually on the lower promenade road; Madeira Drive and pretty sure it a 1/4 mile.
They used to run two at a time but H & S ruled in favour of the cast iron lampposts.
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Re: B25 Sprint bike...

Postby minetymenace » Wed Nov 16, 2016 9:44 pm

Reverse head, SU and blower. How cool is that :cool:
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Re: B25 Sprint bike...

Postby beat » Thu Nov 17, 2016 7:12 pm

very small front wheels, - and I am not sure this Ram Air pipe is bringing the lot.....

;-)


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