Author Topic: Re: 3xv racebike build cdi problem  (Read 170 times)

vinny

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Re: 3xv racebike build cdi problem
« on: February 25, 2018, 10:55:36 AM »
Ok so I was having some cdi issues a while back.
I somehow managed to delete my entire race Bike build thread I only wanted to change a picture 😐.
Not to worry .
so I'm  just going to put these up here for anyone who is interested.
Apologies for the pictures not the greatest but you get the general idea .

vinny

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Re: 3xv racebike build cdi problem
« Reply #1 on: February 25, 2018, 10:59:07 AM »
So this is my 3xv70 sugo cdi .
Kinda makes sense why my bike was so slow . :P

vinny

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Re: 3xv racebike build cdi problem
« Reply #2 on: February 25, 2018, 11:10:55 AM »
This is with the dead standard cdi .

vinny

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Re: 3xv racebike build cdi problem
« Reply #3 on: February 25, 2018, 11:41:26 AM »
This is with the zeel.
Now these are all measured   on our homebuilt dyno which we only finished before Xmas.
 we think   it reads about 5% high .
We are not too bothered as long as it is consistent.

vinny

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Re: 3xv racebike build cdi problem
« Reply #4 on: February 25, 2018, 12:24:06 PM »
I will add more spec and info later. (-P)

Louis

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Re: 3xv racebike build cdi problem
« Reply #5 on: February 25, 2018, 02:58:05 PM »
Hello Vinny,

Quote
Now these are all measured   on our homebuilt dyno which we only finished before Xmas.
 we think   it reads about 5% high .
We are not too bothered as long as it is consistent.

Had a similar thing on my dyno :)

Perhaps this helps, calculated my inertia on this way.
D=390
h=300
metal=7900
shaft 125 x 40 (two times)

V=pi x r2 x h
Drum
V=3,14x(0,195x0,195)x0.300=0,03582x7900=282,978kg

Shaft (coming out off the drum)
V=3.14x(0,020x0,020)x0,125=0,000157x7900=1,2403kg (that two time) =2,4806kg

Total weight 2,4806+282,978=285,4586kg

I = m/2 x r2
I = 285,4586/2 x (0,195x0,195)=5,427

if I take the bearing friction and the short pi (3,14) in stad of the whole number
Estimated that the internally mass is 5,48



King off all twostrokes ''TZR250 3MA''

vinny

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Re: 3xv racebike build cdi problem
« Reply #6 on: February 26, 2018, 03:14:13 PM »
Hello Vinny,

Quote
Now these are all measured   on our homebuilt dyno which we only finished before Xmas.
 we think   it reads about 5% high .
We are not too bothered as long as it is consistent.

Had a similar thing on my dyno :)

Perhaps this helps, calculated my inertia on this way.
D=390
h=300
metal=7900
shaft 125 x 40 (two times)

V=pi x r2 x h
Drum
V=3,14x(0,195x0,195)x0.300=0,03582x7900=282,978kg

Shaft (coming out off the drum)
V=3.14x(0,020x0,020)x0,125=0,000157x7900=1,2403kg (that two time) =2,4806kg

Total weight 2,4806+282,978=285,4586kg

I = m/2 x r2
I = 285,4586/2 x (0,195x0,195)=5,427

if I take the bearing friction and the short pi (3,14) in stad of the whole number
Estimated that the internally mass is 5,48
[/quote
Cheers louis
I will get my technical dept ( the mrs)' to re do the maths 👍