Landracing Forum

Bonneville Motorcycle Speed Trials => Bville Motorcycle Speed Trials Rules Questions => Topic started by: peterdallan on May 30, 2012, 02:22:59 PM

Title: Chainguard question
Post by: peterdallan on May 30, 2012, 02:22:59 PM

Irrespective of whether one should be used or not, I cannot for the life of me find any reference to a chainguard in Chapter 7, Special Construction (A) Class or in Chapter 2, Minimum Standard Equipment to whether one is required or not. There is clear reference to one in the Production and Modified classes.

thanks

Peter

Title: Re: Chainguard question
Post by: Queeziryder on May 30, 2012, 02:29:43 PM

Hi Peter
With the greatest respect a bit of common sense is needed here;

Minimum 1/8" ally or equivilent

Drew the tech guru has given you his email in the other thread and his word is final

HTH
Neil

Title: Re: Chainguard question
Post by: peterdallan on May 30, 2012, 05:30:11 PM

I wasn't planning to not run one, just wanted to find the section that stated on was needed and what it's specification should be.

Thanks for the spec, just surprised it isn't in the rules that's all

Peter

Title: Re: Chainguard question
Post by: peterdallan on April 18, 2013, 08:44:36 AM

I'm referring to the latest rule below and have the following question regarding my primary drive.

The rule suggests that I can run an open primary as long as I have a guard as described below.

I did email Drew last Saturday but no reply as yet, so as I'm close to fabbing that area I wondered if anyone on here could clarify the position.

thanks and regards


Peter

A-PF and APS-PF 650cc


7. B. CHAIN/BELT GUARD*
A Chain/Belt guard is mandatory for primary drive and rear drive sprockets and/or pulleys. This guard must be of suitable steel or alloy material and measure no less than 1⁄4 inch wider that the chain/belt. This guard must also extend over the rearward edge/apex of the rear sprocket.

Title: Re: Chainguard question
Post by: Seldom Seen Slim on April 18, 2013, 10:34:52 AM

I guess it's an AMA/Bub's term, but I'm curious.  What is a

"... 1⁄4 inch wider that the chain/belt."?

Title: Re: Chainguard question
Post by: Queeziryder on April 18, 2013, 10:45:32 AM

Jon
Internet translation of .250" or a quarter  :-D

PS
Tee's arrived OK

Title: Re: Chainguard question
Post by: peterdallan on April 18, 2013, 10:54:01 AM

Sorry, I just copied and pasted from the pdf of the rules, 1/4" it should read

Peter

Title: Re: Chainguard question
Post by: Seldom Seen Slim on April 18, 2013, 10:58:22 AM

Bummer.  I guess it's an AMA thing.  I kinda liked the concept of a 1$frasl;4 -- since I've already got a few of them. :evil:

Title: Re: Chainguard question
Post by: peterdallan on April 18, 2013, 11:47:11 AM

;-)

Title: Re: Chainguard question
Post by: Captthundarr on April 18, 2013, 12:16:13 PM

I have a bunch of 1⁄8, they'er smaller but easier to store. :-D

Title: Re: Chainguard question
Post by: Seldom Seen Slim on April 18, 2013, 12:51:31 PM

Don't try keeping them too long -- I hear there's a shelf life of less than three centuries if you store them within a few parsecs of your home.  The shelf life can be extended by enclosing them in a radon-filled sealed container made of unobtanium and then canodised with a good brand of Great Value* coating.

Just thought you might need to know. . .

*WalMart's brand.

Title: Re: Chainguard question
Post by: Stan Back on April 18, 2013, 12:56:53 PM

I think it's an FIM measurement.