has anyone used the morgan colortune? just debating about buying this and wanted to get some feedback before i commit to buying it.
I have a RVF NC 35 and am worried the colortune wont work as the spark plugs are so deep in the engine, any suggestions?

NC35IRL wrote:has anyone used the morgan colortune? just debating about buying this and wanted to get some feedback before i commit to buying it.
I have a RVF NC 35 and am worried the colortune wont work as the spark plugs are so deep in the engine, any suggestions?

I dont think they do an 8mm plug?

yh, pretty sure they dont, was looking earlier 2day at carb tune and only saw 10mm+ threads

Good point, forgot to check they had the right size, any ideas on how to adjust mixture then? trying to find a cheaper way of doing these things than paying someone a small fortune, when I dont trust them. (in Ireland you don't need a qualification to be a motorcycle mechanic. I have had very disappointing service with more so called motorcycle mechanic's that i'd prefer to do everything myself) Cheers for the input

NC35IRL wrote:Good point, forgot to check they had the right size, any ideas on how to adjust mixture then? trying to find a cheaper way of doing these things than paying someone a small fortune, when I dont trust them. (in Ireland you don't need a qualification to be a motorcycle mechanic. I have had very disappointing service with more so called motorcycle mechanic's that i'd prefer to do everything myself) Cheers for the input

Theres a few irish bikers on here, one of them should be able to recommend a trustable mechanic to you.

Dyno / Someone with a gas analysier is the best way to adjust the mixture.

You can probably do the pilot screws at home, start from factory 1 5/8'ths out from fully in and work in half a turn increments until the idles the best. You'll probably find 1/4 to half a turn in from that best :-)

What problems are you actually having?

Wouldn't bother with most places in the republic. Most seem allergic to carbs at this stage, that is, if they ever knew what they were going in the first place.

You could bring it up north, which will be cheaper and likely more comprehensive.

It all really depends on what you've had done. If its a slip on with air filter mods, you can probably find a very nice balance by yourself, with a bum dyno and a set of vacuum gauges.

Bum dyno lol. IE. racing it up the road as quick as you can.lol.

I havn't done this myself, but soon intend to...

You can measure your air/fuel ratio with a lambda sensor and a multimeter. You just have to get the lambda sensor in the exhaust gases & the voltage output of the sensor indicates the mixture.
You'll have to do some googling for more detailed information as regards the voltage outputs / ratios.

you can build one using a standard narrowband lambda which isnt' very accurate.. it'll just tell you if it's rich or lean.. but the response time / accuracy isn't very quick.

if you want to build a decent sensor you'll need a 5 wire wide-band lambda sensor which are £60.00 just for the sensor.. then they need fancy electronics to control.

Neosophist wrote:you can build one using a standard narrowband lambda which isnt' very accurate.. it'll just tell you if it's rich or lean.. but the response time / accuracy isn't very quick.

if you want to build a decent sensor you'll need a 5 wire wide-band lambda sensor which are £60.00 just for the sensor.. then they need fancy electronics to control.

Oh

I guess I'll have to look into this in more detail if I'm to pursue it then. It could well end up matching or exceeding the cost of a dedicated emissions analyser.

Thanks for the heads up Neo.