How do I properly wiegh a race bike?

nedro · 06-07-2004, 1:36 PM

I'm reworking the forks on a 89 Honda Hawk. It has a Rotax motor which reduces the wieght by about 100 lbs.
I need a reliable way to wiegh the bike for total wieght and front rear propotional wieght.
Can anyone help me out?

SilverBullet · 06-07-2004, 1:44 PM

You can take the bike to a drag strip or a truck station that has scales for trucks to find out total weight.

nedro · 06-07-2004, 1:59 PM

Quote:

Originally Posted by SilverBullet

You can take the bike to a drag strip or a truck station that has scales for trucks to find out total weight.

I don't think truck scales are that accurate. The bike wieghs under 300 lbs.

abtech · 06-07-2004, 2:03 PM

Nedro: You can weigh the front wheel, and add it to the weight of the rear wheel (that's the way the magazines do it). This also gives you the front to rear bias. To make it exactly correct, several people put the wheel that isn't on the scale on a block or something that is the same height as the scale.

You can also go to a CO-OP if you have one nearby or a moving and storage facility or the freight terminal at the airport. Just roll each wheel onto the scale and add them together for the total. If you have access to a large scale like at the freight terminal or CO-OP, then you can verify the "one wheel at a time" technique by double checking the total against the total found with the entire bike on the scale.

MedTechRR · 06-07-2004, 2:05 PM

just put a bathroom scale under each wheel. simple as that!

Baketech · 06-07-2004, 2:21 PM

Quote:

Originally Posted by abtech

Nedro: You can weigh the front wheel, and add it to the weight of the rear wheel (that's the way the magazines do it). This also gives you the front to rear bias. To make it exactly correct, several people put the wheel that isn't on the scale on a block or something that is the same height as the scale.

You can also go to a CO-OP if you have one nearby or a moving and storage facility or the freight terminal at the airport. Just roll each wheel onto the scale and add them together for the total. If you have access to a large scale like at the freight terminal or CO-OP, then you can verify the "one wheel at a time" technique by double checking the total against the total found with the entire bike on the scale.

One 2X4....one bathroom scale...voila...

dB · 06-07-2004, 2:22 PM

I wanna see pics of this Hawk.

nedro · 06-07-2004, 2:29 PM

Quote:

Originally Posted by dB

I wanna see pics of this Hawk.

Ask and ye shall recieve!
This is the actual bike I'm working on.

dB · 06-07-2004, 2:32 PM

Sweet! I love Hawks...even Rotax'd ones.

Are you going to race it?

edit: Hey..what's that swingarm?

Baketech · 06-07-2004, 2:32 PM

That's a Hawk...

Very Cool...

nedro · 06-07-2004, 2:36 PM

Quote:

Originally Posted by Baketech

That's a Hawk...

Very Cool...

No, it's a race bike. A lot of farication was involved not the least of which was the right side chain which required a fabricated rear wheel. The intake is one of a kind. It's been a while so I can't remember everything done to it right now.

Baketech · 06-07-2004, 2:38 PM

Quote:

Originally Posted by nedro

No, it's a race bike. A lot of farication was involved not the least of which was the right side chain which required a fabricated rear wheel. The intake is one of a kind. It's been a while so I can't remember everything done to it right now.

Who made the swingarm?

nedro · 06-07-2004, 2:41 PM

Quote:

Originally Posted by Baketech

Who made the swingarm?

I'm trying to remember, but I think it's a swing arm that is turned upside down and reworked shock mount.

Almost all work was performed by my cousins in their little 6'x8' shop on the side of their house that they affectionately call, "The Factory."

tigerblade · 06-07-2004, 3:30 PM

Wow, sweet Hawk! If Honda would just build a new version of it I'd drop the SV like a bad habit.