Search found 1629 matches

by Adam_Winstone
Sat Oct 12, 2019 5:15 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

^... glad to hear that you're liking the change and that performance is more in keeping with what you were initially looking for at the start of this thread :)
by Adam_Winstone
Wed Oct 09, 2019 11:46 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

"I was hoping to get it to pull right through the rev range.", does it not do this now with your 24-16 range? It should do. If not, I'd start to question whether this is an ignition issue. I'd not get too worried about the specific '19 dbtdc' suggestion as all/any recommendation is only ever a start...
by Adam_Winstone
Tue Oct 08, 2019 3:49 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

What is it not doing now that you want it to do?
by Adam_Winstone
Mon Oct 07, 2019 7:39 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

"24 degrees btdc at 2000 revs and retards back to approx 16 at full throttle", good / normal sort of setting for most road Lambrettas with variable ignitions. Keep an eye (and ear) on it for getting warm at low RPM and reject if you find that you need to. Otherwise, use it evaluate what you've got.....
by Adam_Winstone
Wed Oct 02, 2019 10:05 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

I can't comment on the SIP temp range but my experience of EGT use suggests that the temps vary massively from bike to bike so better to figure out what is a safe/normal temp for your engine, then watch for unexpected rises.
by Adam_Winstone
Wed Oct 02, 2019 2:39 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

What does the ignition retard to when strobe? You will probably find that ignition copes with burning off the charge at revs until 14 dbtdc or so but then struggles and feels rich or like it has hit that rev ceiling. I had one of my bikes dynoed and the rev limitation was not identified but I was co...
by Adam_Winstone
Wed Oct 02, 2019 2:18 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

Yes, it seems as though a factor, or combination of factors, is acting as a rev limiter. I have had rev limitations based on pipe, ignition and carburation factors. Compression and gearing would probably not be a factor as they would still allow the motor to rev on through the lower gears. Ignition ...
by Adam_Winstone
Wed Oct 02, 2019 10:10 am
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

Is it limited to 6500 through the gears or just in 4th?
by Adam_Winstone
Tue Oct 01, 2019 11:16 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

Hi Hugh How funny, not far away then! Please say hello if/when our paths cross. Scotland was a good trip and the range of different bikes/motors showed that there are plenty of viable kits and combinations that can be used well together. We had everything from a home tuned iron 175 to an RB 225 in t...
by Adam_Winstone
Tue Oct 01, 2019 8:02 pm
Forum: Lambretta Tech
Topic: Trying to get an understanding on ignition systems for GT186...
Replies: 35
Views: 1910

Re: Trying to get an understanding on ignition systems for GT186...

Yes, very subjective so please don't take my thoughts as guidance, rather, it reflects what comes to my mind... Changing to a GP crank - always a good move but essential if running a big cc and or tuned kit with a reasonably heavy flywheel. Not as important if running a fairly light flywheel. Change...