Scooterotica

Built a rapido 225, really spluttery until on full throttle?
Set up is :
MB clubman ( running far too close the footboard strut! )
30mm phbh with Marchald filter
1.4 squish
Af ignition.
AF low comp head
Dial gauged and will strobe this afternoon prob to 18 degrees

It was dynoed so I assume the jetting is pretty much ok.(128 main) It was burning gearbox oil so just changed the oil seal.

Would the plug gap effect the running on an af ignition and are they sensitive to a particular cdi?
Any help much appreciated

Is it spluttery on a normal flat road or when going up hills? Only reason I say is ,had the same problem a while back with a Rapido 225, similar set up but with an 48mm clubman. Convinced it was : the exhaust ,CDI, HT lead, spark plug, suppressor cap, checked the new BGM stator all the readings spot on. As time went on started to do it on the normal flat roads as well. Changed the stator back to the old Indian one, problem solved. On checking the LT coil (after some good advice off Coaster & Toddy) the LT coil was breaking down under load and was giving the same symptoms you describe. Timing wise got mine set at 16 BTDC static, main jet 122. Anyway hope some of that may be helpful

It's DEFINITLEY another option, cheers for that, its on the hills or flat, sounds the same.

I have exactly the same set up and it runs a dream. Dyno'ed by Dan and results posted on here in "Scooterotica Workshop" section. Sounds like the LT problem to me.

Rich'

if you're "spluttery" up to full throttle would that point to mid range jetting problems ? Whats your slide, needle, atomiser and pilot ?

Tried 3 different stators and 2 CDI's , same results.
Phbh Carb details:
X2 needle
2nd clip
40 slide
128 main
Av264
Choke 70
55

Would love to get up to ripon just can't at mo
When I say spluttery, I mean nearly unrideable

Have you tried same set up without the filter on ?

whonatic wrote:Tried 3 different stators and 2 CDI's , same results.
Phbh Carb details:
X2 needle
2nd clip
40 slide
128 main
Av264
Choke 70
55

Would love to get up to ripon just can't at mo
When I say spluttery, I mean nearly unrideable

My set up is:-

AV266
X7
2nd clip
122 main
52 pilot
40 slide
Choke 70
300 needle jet

Hope this helps.

Rich'

Similar to to Rich's ,but 48mm clubman, open mouthed no filter , hole in side panel,Race Rapido 225
Dellorto 30 PHBH
atomiser/needle jet AV266
main jet 122
float jet 300
X7 needle second clip
40 slide
55 pilot
choke 70
mixture screw 3 turns out
Indian static electronic ignition set at 16 BTDC

Cheers for the replies
Tried with filter and without, no real discernible difference.

I'm thinking its way too rich so gonna try a few carb changes tomorrow, will update as soon as I get it to be rideable!