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Excerpt from maintenance log a few years ago:2.2.11 31217 Fixed connector on kill switch relay. Rejetted carbs. Original setup: K27 needle with clip on 3rd notch. 5mm cutaway. Idle jet 55 main jet 130 needle jet 261AB. Changed to: K18 needle with clip on 3rd notch, idle jet 50, main jet 142, needle jet 268AB. If mileage suffers, Charles from LC says he’s running the same setup with 52 idle, stock 130 main, 6mm cutaway.Yes, it made a difference, especially in the mid range.
We put about 60,000 miles on our SP III with stock everything. I never felt the need to alter carburation nor exhaust as it ran great and got fantastic mileage. I once averaged 72 mpg traveling the length of the Blue Ridge Parkway. That mid-valve motor was really well suited to the platform. The only issue I ever had was with the magnetic pick-up for the ignition which needed to be cleaned periodically as it would get fouled. Once I figured out what was causing it to run rough I just made it part of my regular maintenance. IMHO, if it ain't broke.......Steve M
I am running standard Euro settings and my bike starts easily whether it is 30 or -10 degrees C.Consumption is as Chuck quoted.Performance? Sorry but this is not the bike for improving by just tweaking the carbs. Valtek timing chain tensioner, quality Electronic ignition with bobbin coils, remove heads and K line valve guides and reseat or replace valves as necessary and replace the rings while you're there for good measure, my end gaps were stupid big after 75k kms. I have a full Mistral exhaust which sounds glorious and the bike runs fine but it will NEVER win the red light derby, your are pushing almost 300kg with approx 60hp at best with the frontal area of a D9 bulldozer When riding keep the donk spinning >3500 RPM it will reward you :Beating_A_Dead_Hors e_by_liviuAdam
Mine was quite lean until I changed the jetting. Mileage dropped from low 50s to low 40s after rejetting. It ran a lot better, especially in the midrange.
That is quite a big drop in mpg!
ThanksWe figured that it was a de-tune to lean it out to meet US emissions. Did it have the expansion chamber?? or the straight crossover?
I've read the jetting specs and heard the comments on performance, and chose to keep my Mille's jetting stock for that very reason. I like not getting to reserve until I've gone 275-300 miles.
I had previously gone to a straight crossover before the jetting changes. It made it a touch leaner.. that's when I decided to rejet.
ThanksDoes yours have the expansion chamber? or a straight crossover? I have just put in a new timing chain and the banana tensioner. The rest is stock but the crossover. It occasionally starts hard when warm. Maybe the new chain will fix.I am very happy with the performance. That being said...... I don't borrow other peoples equipment so this is the only bike I've really ridden in 10 yrs (other than a dealer test ride on a new Ducati Scrambler) so I don't know any different. Again....I love the bike!!!
If mileage suffers, Charles from LC says he�s running the same setup with 52 idle, stock 130 main, 6mm cutaway.
This is what I had in my SPIII with LaFranconi's and a non-stock crossover. I would always get upper 40's-to low 50's mpg. I have the same setup on my 1000S(same engine) with similar mileage.
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