Bonneville B25

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scootin newton
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Bonneville B25

Postby scootin newton » Sat Dec 24, 2016 5:14 pm

Belongs to a good friend of mine
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Andy Chaos
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Re: Bonneville B25

Postby Andy Chaos » Sat Dec 24, 2016 5:31 pm

Will it be running next year?
I t would be great to see it there, i am not sure how that red fairing would work out though &lt;069 <12fs
Last edited by Andy Chaos on Fri Dec 30, 2016 11:36 am, edited 1 time in total.

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Re: Bonneville B25

Postby lathejack » Sat Dec 24, 2016 8:16 pm

Mmm, nice. So is the bike in front going to be a Bonneville Bantam?

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scootin newton
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Re: Bonneville B25

Postby scootin newton » Sat Dec 24, 2016 10:12 pm

Hopefully it will be sorted out by then, Bantam is in for some repair work

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Re: Bonneville B25

Postby koncretekid » Thu Dec 29, 2016 11:35 pm

Hope to see your friend there next year. Record at BMST is 82.541 mph in M-PG (Modified Pushrod Gas) class, 94.194 mph at SCTA. At BMST, there is no record in M-CG which is pre-1981 Modified Classic Gas, so good to go! Be sure to advise him that if he sets record, he will have to remove cylinder head for measurement and there is NO tolerance on class size (250cc maximum).
Tom
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scootin newton
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Re: Bonneville B25

Postby scootin newton » Fri Dec 30, 2016 1:59 am

No oversize bore from stock ?

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koncretekid
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Re: Bonneville B25

Postby koncretekid » Sat Dec 31, 2016 4:45 am

Overbore only if the maximum cc for class is not exceeded. A B44 would be allowed an overbore up to 500cc, but a B50 or a B25 cannot be bored because the maximum class size would be exceeded so they would be bumped up to next class size (650 for B50; 350 for the B25). I could run in 500cc class with my B50 bored to 92mm because it was de-stroked to 75mm making the total 498cc.
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HPbyStan
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Re: Bonneville B25

Postby HPbyStan » Sat Dec 31, 2016 5:57 am

Also, I heard one should only put the gear box in one gear at a time.

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scootin newton
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Re: Bonneville B25

Postby scootin newton » Sat Dec 31, 2016 6:27 am

Is neutral allowed ?
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koncretekid
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Re: Bonneville B25

Postby koncretekid » Sat Dec 31, 2016 3:21 pm

High gear only will work fine. No gears required so no gears will be harmed.
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Re: Bonneville B25

Postby HPbyStan » Sun Jan 01, 2017 1:55 am

koncretekid wrote:High gear only will work fine. No gears required so no gears will be harmed.

How is it his 250 can get by with direct drive but your 500 needed a full gear box full ? One of us doesn't understand and I think it's me.

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scootin newton
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Re: Bonneville B25

Postby scootin newton » Sun Jan 01, 2017 3:36 am

You're not the only one Stan

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koncretekid
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Re: Bonneville B25

Postby koncretekid » Sun Jan 01, 2017 2:28 pm

HPbyStan wrote:
koncretekid wrote:High gear only will work fine. No gears required so no gears will be harmed.

How is it his 250 can get by with direct drive but your 500 needed a full gear box full ? One of us doesn't understand and I think it's me.


OK, if you want the truth! One can be easy on the gears on the Salt Flats because we have at least a mile to get into top gear and the Salt does not offer very good traction anyway. Slip the clutch a bunch on start which can polish up the steels, but just take it easy and they'll last the meet. But be careful on downshifting, especially if you have a trials type 1st gear cause the layshaft and sleeve gear don't like large speed changes. That is what broke my gears.

As for what gearing to use, gear it so that your peak horsepower RPM is geared for your expected top speed. Your friend may not know his potential, so several sprockets are a good idea. Also, bring lots of jets and spark plugs. I usually take half a truckload of spare parts. It's a long trip if you're not prepared.

Tom
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scootin newton
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Re: Bonneville B25

Postby scootin newton » Sun Jan 01, 2017 6:06 pm

Thanks for the info
My partner usually has lots of spares and people to help, he's been running his Indians mostly, the B25 is for his Grandson
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scootin newton
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Re: Bonneville B25

Postby scootin newton » Sun Jan 01, 2017 6:36 pm

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beat
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Re: Bonneville B25

Postby beat » Sun Jan 01, 2017 6:46 pm

:grin: :thumb :grin: :thumb :grin: :thumb

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koncretekid
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Re: Bonneville B25

Postby koncretekid » Sun Jan 01, 2017 11:07 pm

In my next life! Interesting bike - - looks like the motor is tilted forward. Maybe our resident flat track builder can give us the lowdown on that design. Hope to hook up with your friend next August.
Tom
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scootin newton
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Re: Bonneville B25

Postby scootin newton » Mon Jan 02, 2017 1:49 am

Was tilted to get trans sprocket in sync with swingarm pivot


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