Fixing inaccurate instrument cluster By motley (Read 877 times)

[motley]

My speedometer is old and very inaccurate. 50 MPH on the speedo is actually 30 mph.

I've read of many reasons they go bad. But I don't want to jump to just replacing stuff that's not entirely needed.

If anyone can help me correctly fix this that would be awesome.

*Also, is it possible my rpm gauge could be off. At 7,800 rpms the motor runs/sounds like it's going only 6,000 rpms with plenty of power to go.

VIP future champion model

[czmdiver]

Seems they are all mechanical and come from the Factory Inaccurate as mine is also. I pay no attention to it anymore. Its the nature of the beast...
In all practicality there really nothing can be done.
As far as the Tach I run a Trail tech tach, just a inductive wire rapped around the Spark plug wire and is spot on.

[motley]

I was considering on doing something like that for a tachometer.

I know I could configure once I pickup speeds, 8,000 rpms equal 35 mph etc. Of course this varies upon roller weighs etc.

6,000 rpms with 3 - 4 gram rollers could be 15 mph.

6,000 rpms with 6 - 8 gram rollers 'could' be 25 mph or lower. All depending on the riders weight etc etc.

*just something to fiddle with.

As for faults, there's a possibility of a bad gear puck "I think that's what it's called".

I had a guy tell me in the past the cable becomes stretched and weak, causing it to become sensitive. I think it's bs.

I also read that there's a plate inside the cluster that can be adjusted by bending it..

I've had my eyes open for a dirt cheap replacement " under 20", but nothing so far.

I've also considered getting a digital speedometer, something you might buy to make a dirt bike street legal. Haven't found anything cheap under 100 yet. And I prefer not investing money like that in this crap bike >.<.


Do you oddly have a amazon link to the one you bought?

[czmdiver]

www.trailtech.net/tto
Here ya go!!

[rks]

I'd go with a speedo something like the one in this....LINK

[czmdiver]

Mar 2, 2018 5:31:42 GMT -6 rks said:

I'd go with a speedo something like the one in this....LINK

Ok thats pretty cool for under ten bucks.
I think ill have to pick one up.
                 

[richardv]

Do you know that LINK is really WalMart. Just thought some might like to know.

[motley]

Interesting!

I might get both to be honest.

I'll probably see if I can mount the bicycle one on the mirror. Cops will probably think it's something else.

I'll have to look into its size, and wiring better

[rks]

If you have a smart phone, there are motorcycle handlebar mounts available. Snap your phone in it, turn on your speedo app, and hit the road. Biggest drawback would be removing and re-installing at every stop you make.

The link I posted above will take you to Walmart......but these are available all over....bike shops, Amazon, Ebay, etc. Just measure your front tire's circumference, and then make sure the unit you buy can be set to that number. Example: My 110/90-12 tire covers 61.6" in one revolution. When I had a 120/70-12 tire on it, the measurement was 58.4 inches. (going from memory, numbers may be off by a couple of tenths)

Do a little research, you find one that'll work.

[cyborg]

Great idea fellas!!!!!! I'd go trail tec myself ,but for ten bux and free shipping the other one looks to be a very viable option

[motley]

I ordered that bicycle mph gauge.

But; I have been looking at a few other alternatives to make it more wanted when I sell the bike.

I plan to remove the entire speedometer and create a basic custom plate.

Then I'm just manually going to add gauges, once done I want to cover my custom speedometer with plexiglass, then screw it in.

I'm going to document part numbers for exact replacements.

I'm pretty good at making stuff like this so if this day comes soon I'll take pictures, document parts, maybe add simple instructions. This way someone could do the same or very similar.

From what I've configured with name brand parts it's going to cost 30 - 40 dollars. Not bad, and practically the same price as OEM clusters

[ucwt]

I've toyed with the idea of taking the cover off running up to 35 (GPS'ed) and pulling needle and putting back on.

Did this to a car I had to repair the speedo and worked well.

Not sure if I care enough to bother with it though.