Hey yall! Now that its cooled down a bit I've been riding my Stella a bit more, and I've been thinking about its temperatures, as well as some quirks that are affecting its rideability. I have a Trailtech cylinder head temperature gauge installed under the sparkplug.
A couple of people here have told me it should almost NEVER creep above 300F, and should ideally stay around 250F all the time. It goes above 300 if I cruise at 55+mph for more than 30 seconds or so. If I am really wringing it out on backroads it might hover around 295-310F. Once I stop at a stop sign or light for a few seconds it quickly cools down below 280.
Main jet 130, BE5 mixer, 140 AC. 52/140 pilot 2.5 turns rich.
I put a new sparkplug in recently and the old one definitely looked a bit rich. I believe this is partially due to me cruising around at the bottom of the powerband where it is a little rich and the pipe is not exactly matched to the cylinder. This is the main quirk that I am thinking of tackling right now.
The VMC 177 + SIP 2.0 revs high but below the powerband it is really flat, and 4-strokes and sputters a lot. A new box exhaust and a MRP intake + Keihin PWK28 have been on my wishlist for a while, but lately I have considered a SI 24/24 as an interim upgrade along with a new box. My choices so far are the Polini box, Malossi power classic, and the SIP road 3. Polini box seems to make the most power and torque and is pretty quiet but last I checked no one sells them locally in America; need to ship from SIP or something which is more expensive. Malossi box is close in performance and is sold locally by scootermercato but I have heard it is pretty loud. SIP 3 is also close in performance and is sold locally but I have heard complaints about its strange shape causing ground clearance issues.
With the MRP intake I would definitely be forced to finally get the dremel out and do some case work to match the cylinder, smooth out the crankcase path, etc., and I don't have the time or courage to do that yet. The sub $100 SI 24/24 is looking pretty promising as an in-between upgrade thatll help me get that little extra oomph to grow into the 23/64 gearing I did.
Thoughts? Any other exhausts I should look into?