Hi there, I thought it would be the most appropriate place to revive the Cagiva Raptor 125 discussion. I have derestricted model from 2006, which according to the previous owner, was running fine since he bought it in 2016.
Initially, the problem I saw was the engine stalling after you rev it high on neutral and release. Also, it was hard to start with the electric starter without adding some gas.
The previous owner changed the throttle slide and reed valves, but the problem persisted. After that, I couldn't start it with an electric starter at all, and the stalling problem on low idle revs happens not only after you rev it up and release but also when it just stays on idle revs. I was told that problem might be worse when the bike is warmed up (so you ride it around a little, and then it stalls more often), but I haven't checked that personally.
I've got the bike with a discount as it doesn't run properly, and he told me likely it would be fine after changing the reed cage and maybe the pilot jet as it was unaltered. However, as you can see in
the photos, the reed valves don't seem open to the degree that would cause trouble (according to instructions I saw over the internet). Both main and pilot jets seem to have around the right size: 120 and 65, choke jet is 65, while default sizes for main and pilot on Cagiva Raptor 125 AFAIK are 110 and 60.
Right now, I have en-route:
- V-Force 4R kit reed for Cagiva Raptor 125 97-07, which according to what I see with my eyes is not a requirement given that current reed cage and valves are OK, and which according to @Remy is not better than original, as Boyesen could fit it and provide higher performance. I thought of returning V-Force once it arrives but then figured that the replacement the previous owner bought seems to be produced by Boyesen as well, just not the exact model @Remy used;
- 2 Stroke Performance Carburetor Carb Stage 1-3 Jet Kit from 6Sigma Jet Kit, which I ordered before checking the jet sizes and verifying that they seem to be fine and I don't need a change;
- Athena Full Gasket Kit + Engine Seal Kit from pjme.co.uk, which I thought would be nice even if I won't need it right now.
I plan to replace the reed cage, valves, and jets once the replacement arrives and then try to tune the carb myself and likely find some carburettor expert around me to help me once I fail.
The question I have is the following: if the change of jets and reed cage won't help, and tuning the air bolt and idle revs bolt won't fix the idle stall, what is the next thing I should check? What would be the primary suspect for idle revs engine stall?
And while we are here, is the snorkel (which seems to be the stock one) good enough for derestricted Raptor 125? According to the owner, the bike was running derestricted for six years, so the answer must be positive, but it would be nice to hear what others did to their Planets\Raptors.
