Kheper CDI

[vintage65scoot]

Hi all have just brought one of these cdi's just wondered if anyone had used one. It is to be used on my mugello 186 kit
which has a lth reed and NK road touring type exhaust was wondering what sort of degree to start from 22 deg ish on to about 17 or 18 deg to be safe its set at the moment static its set up at 19 deg.

[jonashford]

eden has used it for a while

[Knowledge]

Is this a CDI, or and add-on to a standard CDI?

[vintage65scoot]

Its progammable ie you can change the curve via a laptop which i have yet to try so i assume you change curve/advance retard at various revs

[Captain Pugwash]

Just trying a couple of Kepher CDI units myself, but Eden is the person to ask as he's run one in his scooter for a few months now.

[Eden]

The curve ive ran for a few months has static at 24, it holds that to 4500 rpm then drops to 18 at 6000 rpm then drops again from 6500 to 14 degrees at 9000 rpm.

the curve you use depends on your engine and how you intend to ride.
Ive tried a few curves on mine since putting it on my GP before this years euro.

[vintage65scoot]

Hi thanks Eden for the reply dont think my engine is set up is anything as powerful as your speed machine. It defenatly does not rev as high as yours probibly 7,000 max so was thinking to try to set curve from 22 deg static round to 16 or 17 at about 7000rpm . I dont ride anywhere as far as yourself 70 miles on a rideout at various speeds for a crawl to 60 mph

[Eden]

Try it with the curve for lambretta that comes with the software abd see how it goes.

[vintage65scoot]

Ok will start there and see how it goes once again thanks for you time cheers Mark

[eaijm01]

Hi just purchased one of these, reading the spec for these it says to set the static timing to 26deg for Lambretta. Reading some of these reports suggests other. Currently set up at 19deg as per AF Rayspeed on a GP200 with rapido spec. Did run on setting 8 for Lambretta but as yet to change existing timing. Also what android model phones are you using as tried 3 all above the android 4 but all fail to run or come up with parse errors. suspect incompatibility issue as third party apps downloads accepted.

[Knowledge]

Welcome to the forum.

Have you strobed your flywheel in order to see what your timing is doing? If you have marked TDC and 19 degrees (I find 17 degrees a more helpful), then, under the light of the strobe, you should see the pointer on the flywheel on the left of the 17 degree Mark, and moving up to and then to the right of the mark as the revs rise.

If you haven't strobed the flywheel, you could be setting off with a timing setting which will ruin your engine.

Good luck.

[eaijm01]

Welcome to the forum.

Have you strobed your flywheel in order to see what your timing is doing? If you have marked TDC and 19 degrees (I find 17 degrees a more helpful), then, under the light of the strobe, you should see the pointer on the flywheel on the left of the 17 degree Mark, and moving up to and then to the right of the mark as the revs rise.

If you haven't strobed the flywheel, you could be setting off with a timing setting which will ruin your engine.

Good luck.

Removed flywheel and checked with timing disk and strobe. Existing timing at 19*btdc. Kheper states to set to 26*. Reading some of the other reports suggest between 22 & 24, so have set at 24* for now.
Regards Ian

[Knowledge]

Ok Ian, how does it ride?

If you hear a noise like a 10mm spanner rattling inside an otherwise empty legshield toolbox, then this is dentonation. This is bad, and throttle off. This would indicate that the timing is still not correct.

[eaijm01]

Having tried two of these units I was not impressed by their reliability. The first failed to upgrade and restore after doing a firmware upgrade, the replacement unit fail to give an output spark after only two miles resulting in long push home. for the short time it ran I did notice a difference and it felt responsive and the ability to Bluetooth details to a phone was why I went for this product. however having tried to get the app to work on three different models android phones all above android 4 meet with failure. for now until this product improves I have reverted to a Kytronic smart booster 2, may have less frills but has run straight from the box covered a few hundred miles and of the 16 options curves so far tried 4 and 7 seem the best for my GP200 rapido set up.

[CHRIS in MARGATE]

Important to tailor any retard unit to suit your riding style. I personally set mine to ensure safe ignition timing at my longest period at cruising speed which is about 58 mph and at about 6000 rpm. At that engine speed I know I can safely hold the engine for say 40 or 50 miles at a sensible firing position.
So you need to know your gearing/speed ratio so you can be confident that at 60mph you know your rpm and your firing point and then you have the confidence to hold it there; albeit still with a hovering left hand !

[gp200ts1]

Been waiting for a replacement for a mark 1 that failed and became a 'brick'. Been promised a replacement months ago but nothing yet. Not very impressed with customer service