Sigma BC800 Setup....(help needed)

essexbloke · Post by **essexbloke** » Wed May 04, 2005 1:38 pm

Lol.........

Kaz, it's a little computery thingamyjig (commonly used by cyclists) to give them an accurate speedo/trip.

My trip has died on the storm, so have fitted one instead of shelling out 300+ to Mr Honda... (+ it has the benefit of providing a 100% accurate speedo reading & records max speed travelled, good for bragging down the pub)

course, it's only any good if you calibrate correctly, hence my probs....

PS,
so far i've got a maximum speed of 234mph!!!! beat that!!! (yup, not set up correctly)

L8RGYZ · Post by **L8RGYZ** » Wed May 04, 2005 6:09 pm

essexbloke wrote:Ah........ think i understand now....(not a chance)

ok then. you gave me the figure according to the rear tyre, but the sigma's fitted to the front, (120/55/17)

whats the figure for that one? (still lost on working it out)

(thanks)

(is this right?) - 120 x 55% = 66

so, 66+431.97 (17")+66 = 563.97

x Pi = 1770 ???????

One small, but critical error. Your front tire is a 120/70ZR17.

So... 120 x 70% = 84

Net result is 1883 according to my calc.

essexbloke · Post by **essexbloke** » Wed May 04, 2005 7:43 pm

Doh..... (ha, ha, notice you're the only one to spot the ...err... deliberate mistake......)

Thanks....

Galaxieman · Post by **Galaxieman** » Thu May 05, 2005 4:33 am

Don't forget to divide the final number by the conversion listed in the manual (1.61 according to my manual) or even though you've got the dial set to display 'MPH' you're really displaying KPH. I didn't do that on my Sigma 1200, and my test run around the block netted a max speed of 94 'MPH'. I thought it was a bit off, and a quick review of the manual highlighted my error.

-Jim

essexbloke · Post by **essexbloke** » Thu May 05, 2005 8:28 am

Ah ha.........at last.....

Got home last night, punched in the final correct no. took it out, was reading approx 45mph when i was only doing 30... & 145 @ 100mph

that explains it...........

So then, lets get this right....assuming 1883 is correct, Divided by 1.61 = 1169 as the final figure.........

Do we all agree?

Galaxieman · Post by **Galaxieman** » Thu May 05, 2005 8:58 pm

I've got mine set at 1170, and it seems dead on. I figured it was stupid to try and re-do all the calculations I already did and just went and pulled mine off the bike to check. 1883/1.61 = 1169.565 so 1169 or 1170 are both about right. Have fun with it. Does the 800 have a max speed capture like my 1200 does? Best I've seen is 140.3 since the wreck last summer... Keep us posted.

-Jim

essexbloke · Post by **essexbloke** » Fri May 06, 2005 8:13 am

OOh yeah....SORTED !!!!! (at last)....

Up to about 50-60mph (speedo) is exact, but over that, seems to differ a little.

At 90 on the speedo, the sigma is reading approx 85, but i'm guessing this is the inacuracy of Mr Honda's clocks....

oh yeah, MAX SPEED function is cool!!!!!!!

essexbloke · Post by **essexbloke** » Mon May 09, 2005 1:47 pm

so what's a "road angel" is it some sort of gps?

Jaglifter · Post by **Jaglifter** » Fri May 13, 2005 7:36 am

Put a tape measure around the high point of the tyre and divide by 3.142! Sorted

essexbloke · Post by **essexbloke** » Fri May 13, 2005 8:29 am

NOW he tells us !!!!!!!!

Cheers m8, got it sorted now...