Son is riding international class and bike needs to weigh 154lbs.Specs say 146 dry wt.Has anyone no what wt bike is with gas and oil.Not a real easy way to get this figured out.And what material do all use and where to put on bike.Seems down low by engine sump guard most likely.Any Ideas?

Thanks JR

Oil density = 0.9kg/l

Petrol density = 0.74kg/l

 

500cc gearbox oil + 2.5 litre petrol = 0.45+1.85 = 2.3kg ~ 5lbs

 

Does dry weight include radiator fluid??

 

Id say lead weights (wheel rim weights) stuck somewhere.

 

PS Get the bathroom scales out

Edited July 8, 201511 yr by faussy

Wheels turn so add ''more'' weight during riding. better to put it somewhere which is absorbed by the suspension, and central. So I would put some lead near the engine plate.

 

Thats also what the pros would do.

Edited July 8, 201511 yr by crazybond700

Weigh each wheel on the bathroom scales. Try locate some old lead, possibly from a local builder, offer him some money as its worth £1 per kilo in scrap. You can then smelt it back down into casted shapes to fit neatly in the sump guard. Dont breath in the fumes though!

Odds are good your bike is OK as is unless it's loaded with titanium widgets. Weigh it and see. Data from the factories is notoriously optimistic.

I couldn't find FIM tech procedures for trials but the AMA/FIM Motocross procedures say fuel must be drained.

 I would not worry until tech inspect.

I dont think a Beta actually weighs 146 lbs. I think you'll be fine.

Edited July 9, 201511 yr by motomofo1

Yes fuel must be drained.Put my 2012 bike on scale with half tank fuel wt 149.Lead is what I figured just have to shape for sticking in bash plate area.Seems a bit of a silly rule but what do I no.

JR

Yeah it is a silly rule but one Honda can live with. The other way to control hyper trick factory bikes is with a claiming rule and the factories are a lot less happy with that idea.

When you think about it it is really ironic. The whole logic for weight rules were to prevent the factories from buiding one of a kind machines with exotic materials that provided an advantage over the production bikes. Now the production bikes from "most" manufacturers are below the weight limits and will stay that way because that is what the customers will buy. All except for Honda. When a rule is put in place to protect the interests of one rider or manufacturer it's a bad rule.

When you think about it it is really ironic. The whole logic for weight rules were to prevent the factories from buiding one of a kind machines with exotic materials that provided an advantage over the production bikes. Now the production bikes from "most" manufacturers are below the weight limits and will stay that way because that is what the customers will buy. All except for Honda. When a rule is put in place to protect the interests of one rider or manufacturer it's a bad rule.

 

A bad rule is worse when a) its not policed and everyone knows when the bikes will be weighed.

Put lead in the airbox for tech inspection, job done.

Used to be the same way with the sound check. Stuff steel wool into the pipe, ride gingerly to tech, ride back at full throttle to blow out steel wool.

You cant teach the Americans much.

 

Except world geography?

True, we know how to use an apostrophe. Well some of us do. OK, I do.

 

Dabster, You must have gone to the Jeremy Clarkson school of " 'murican " hating.