| Author | Message | ||
     Ratbuell |
Well, got the S2 back together and running with thunderstorm pistons, heads, and cams. Wow. Nice to have that much torque in a comfy bike! The narrow bag lids make a huge (slimming) difference too, but for around town they're plenty. They have plenty of room for a tool pack, quart of oil, and packable rain suit in one side, and gatorade/lunch on the other side. Anyway, she's a bit boogery at low speeds / low throttle, and I'm guessing it's the slow jet. With the supertrapp exhaust, 12 discs, no endplate, and stock S2 aircleaner I have it set up with a 42 slow and 185 main. I started there based on my S1W - same engine, but more free-flowing V&H pipe - that has a 45/190 combo. I figure I'll bump the slow jet up to a 45 and see how it does. It's cooling down from its first run; once I can touch it without melting my fingerprints off I'm going to read the plugs. On-throttle power is good, so I think the main jet is a keeper for now. Also, is there a "thunderstorm" ignition module for a 95? Or should I try the "race" box? Trying to pull a little advance out of it..I dialed back the pickup plate some and it helped, but she bottoms out now. I'm hoping with the new slow jet I can put a couple degrees back in and not ping. | ||
| Onahog |
Joe.... I did mine up with a 45 slow, 190 main, and added the S/E 40k coil,wires,8000rpm module , 10r12 plugs , 12 discs, open end cap,6" round K&N filter, breathers to a K&N filter...Timing set in middle of hole as specs.....Goes like raped ape with NO pinging on •••••• Canadian regular fuel... Good ta hear its running without Valves bendin...& Thats those skinny Lids are put ta use!..Hankb | ||
| Tattoodnscrewd |
With the Screamin' Eagle selectable curve ignition (the 8000 rpm module - actually selectable from 6000-8000 in 500rpm increments - also what I run on my S1 beast) you can do a static base timing.. there is a LED on the module that will turn off once you go past TDC ... it will help to make sure your base timing is set right - then you can select the proper curve for your setup ... start with the most aggressive then back off until no pinging .. The first curve sets advance at 1500 rpm - too early for my bike - with the Force pipe on mine, power doesn't come on until after 3k rpm .. in which case curve 2 works great - advance kicks in at around 3k rpm ... no more pinging .. I even rode in a parade today in super hot and humid temps ... and while others on XB's were experiencing pinging and power losses off idle, my S1 was doing just fine - It's a good ignition module to get... (just my half a cent...) As far as jetting - what I am running probably won't help you too much so I will not add input to that part of your question .. | ||
| Jackbequick |
Rat, I wouldn't be afraid to try a #48 on the slow speed jet. That works beautifully on all the later tubers with the CV-40 and the improvement in slow speed smoothness, warm up, and low to high speed transition is remarkable. With your exhaust and intake changes, going to a larger main jet might be in order too. My M2 had a 195 and I would have gone to a 200 if I had been a more aggressive rider and used full throttle much. You might want to be careful about any sustained full or near full throttle time until you can get some plug readings. Opening the throttle too quickly on a not fully warmed up engine with a CV-40 will usually produce a pop back through the carb but once warmed up, that will not happen. If you haven't done it yet, uncap the slow speed mixture screw, set that at 2-1/2 turns opened from gently closed, and that should be a safe starting point. Jack | ||
| Ratbuell |
Well, I read the plugs after the 42/185 run. They were a nice golden brown (can you tell I'm hungry...). Not bleached white, so I'm not too worried. I put in the 45 slow jet and took a quick 5 mile run. It would seem the slow speed hiccup is gone, but a longer run will tell. I was just trying to get back before the rain hit too hard. She does flatten out a bit above 4500, but that may be from the timing being pulled back. I'm going to take a long run to work tomorrow, and see how the pinging is. If it's good after a long hot run, I'll put the timing back where it was... One step at a time. Thanks for all the input! | ||
| Phat_j |
put your timing back to where it was, go up to a 45 and turn the screw out 2-2.5 turns... |
