Tacho / Rev Counter

[wayne 426]

When riding at a constant speed/constant throttle, my tacho needle jumps & fluctuates to higher revs.

Riding at a constant 3000 rpm needle up & down to 4000 rpm.

When accelerating hard tacho works normally.

Tacho gets its signal from the ECM, where does the ECM get its signal from?

Anyone come across this before?

[fast_eddy 712]

Have a look at page 19-14 of the workshop manual.

My favourite is a crusty connector in the headlight or at the ECM (under the tail) or one of those shitty little wires there.

[wayne 426]

Replace the Tacho hmm / Replace the ECM F***ing ouch, don't think its a broken wire or it would not work at all.

Edited November 13, 2011 by wayne

[fast_eddy 712]

Nah, that'd only happen if you went to a honda dealers and let a fitter loose on it... in which case they'd change both!

Like I said.... My favourite is a crusty connector in the headlight or at the ECM (under the tail) or one of those shitty little wires there.

[wayne 426]

Hope so,

I have a spare tach tho, & a spare ECM (just remembered ECM is in loft with spare fuel pump)

[fast_eddy 712]

Grab a tin of this.... http://www.toolstation.com/shop/Automotive/Lubricants+Sprays/Contact+Spray+400ml/d60/sd2795/p81507

Hope you've got the keys and hiss unit to go with that spare ECM..... it'd be easier to spray the bloody connectors tho!

[wayne 426]

Fixed it, changed HT leads, had some of those multispark things in line, removed them fitted new leads seems ok.

Just need to take her for a spin.

[fast_eddy 712]

had some of those multispark things in line,

What are they meant to do then, apart from bugger up your tacho?

[wayne 426]

Give you five sparks at the plug insted of one, been ok for seven years, supposed to improve the burn, give better fuel economy, easier starting, smoother running & small bhp improvement.

My X did use 1 litre less fuel than john & Stewart for the same milage, every time we filled up this year when we were when going to the dutchx11 do.

But I also have the ignition advancer fitted so ?

Contacted the makers they offerd a full refund or change the units, as they guarrantee the units for 10 years.

[wayne 426]

This be the item x4 one on each lead Edited November 17, 2011 by wayne

[fast_eddy 712]

Interesting.

Maybe the wiring needs shielding or summat?

[wayne 426]

Been out for a 30+ mile run, Tacho fine

[wayne 426]

They sent me 4 new units + a free "fuel diamond" (stops fuel going stale in tank & give a cleaner burn ??), will fit them & see if tacho behaves.