Fuel injected Armstrong 500? Am I mad?

Blitz · Post by **Blitz** » Sun Jan 12, 2014 5:38 pm

Have you got an internal fuel pump fitted now?
Are you happy with all the parts or have you got bits in mind/upgrades.

I asume once you are happy with the EFI settings these can then be used on any 500 with your retro fitted parts ?

Yoof · Post by **Yoof** » Sun Jan 12, 2014 5:45 pm

The fuel pump is external and is fitted under the tank.
Its large and noisy and made in china... I have on off a Yamaha R1 that I may fit later but this one it working for now.
My fuel map would be a perfect starting point for another rotax 500 however its just like a carb and it effected by different inlet tracts and exhausts etc.

Blitz · Post by **Blitz** » Sun Jan 12, 2014 5:59 pm

So what's it like now from cold? Kick it. It fires up and runs? Reducing revs as it warms up and doesn't stall even if you throttle her ?

Ie everything the carb version won't do ?

Yoof · Post by **Yoof** » Sun Jan 12, 2014 6:14 pm

Starts well, when its cold I need to have a small amount of throttle open as I dont have a fast idle valve. After the "afterstart enrichment" turns off (about 150-400 engine cycles depending on engine temp) it settles down to a steady idle.
The fine tuning I need to do now is making sure it will start well at any engine temp, when thats done it should kick start ok and start on the button after a couple of cranks like a factory fuel injected bike. Also need to adjust acceleration enrichments and low speed responsiveness.

Blitz · Post by **Blitz** » Sun Jan 12, 2014 6:25 pm

Sound like your getting there. Impressive.

I know some people like the battle of a single carb bike but if I can change the bike to my liking then I will ride it more, so it's a win win for me.

My MT is my only bike so it's not a play thing.

appyarry · Post by **appyarry** » Sun Jan 12, 2014 7:05 pm

I'm JEALOUS, and that's partly because you can buy Timothy Taylors in a local boozer any time you feel like it

And also because I love the work you've done. Well done, great example of what can be done with a bit of determination.

Thank You for sharing it.

ellrider · Post by **ellrider** » Sun Jan 12, 2014 7:12 pm

appyarry wrote:I'm JEALOUS, and that's partly because you can buy Timothy Taylors in a local boozer any time you feel like it

as long as he has ID.

Yoof · Post by **Yoof** » Wed Jan 15, 2014 9:19 pm

Problem...
I have a voltage readout on my Acewell speedo and with the headlight on (55w H4) it is showing 12.0V

(need to veryify the accuracy of this ...
So I think my inline fuel pump is drawing alot of power.
Going to have a go with a Yamaha R1 pump that Ady got me and see how that goes. But im thinking of retrofitting a f650 alternator which is 400W... watch this space.

ellrider · Post by **ellrider** » Thu Jan 16, 2014 6:46 am

Go for it Yoof,

When you going to fit a water cooled engine, at this rate you will end up with a F650.

twmtomos1 · Post by **twmtomos1** » Thu Jan 16, 2014 9:27 am

ellrider wrote:Go for it Yoof,

When you going to fit a water cooled engine, at this rate you will end up with a F650.

why dont you buy a F650 and paint it green you can still come to the club meetings to fix all the MT

MT Riders Club

Fuel injected Armstrong 500? Am I mad?

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