MOPED ARMY

for that gearing and pipe I would think 45 sounds about right.

i thought that 40mph @ 16x40 would be between 9-10k rpm

is there a spreadsheet for gearing?

also, kstars are a bit "rattly" during break-in right?

i can hear a pingy kind of rattle at idle, can't hear it at speed (full face w/ visor down)

thanks for the response!

The pingy is likely due to the rough ports, a little chamfering may help, it did with mine.

as for gearing, i've heard stock gearing for break in is ideal

hit all rpms, just limit the highest to only 30% of the time or less. Depends how you like to ride. If its all tight, it doesn't really matter.

16X40 is the same as 18X45 if anyone is interested. I had no idea my K-Star was turning such high RPM. Thanks

Gap your ring if you haven't already

Good one on the golf ball squish trick, thanks wayne. Chris, I am running faster than 50, never gpsed. Iwill try to rattle off my set up. 19 degree advance as mr powerchair suggsts, 15.5:1 compression, widened exhaust port, homemade 19mm intake, widened intake port, 19mm Dellorto carb, volswagen 6V coil, header and exterior exhaust port matched to a Homoet 6P, the usual smoothing of transfers etc. If I put a 36 tooth sprocket on the back it has enough overall HP to go faster. There are quite a few things I could do to get more RPM out of it. Big pipe, big carb, big exhast port, 230psi compression test will get you there. If you put a 24mm Mikuni flatside on it with matched intake and porting it would handle it. Most people who have 6Ps have more sophisticated cylinders but the K-Star loves it and the pipe comes on reasonably early. It's an unloved cylinder but with a little gentle coaxing it delivers ample power with better than average durability. And as Dan says gap that ring. .015 inch for me

650 feet above sea level. is that a lot? I have no idea. I will try the golf ball trick. I think the ring was gapped properly, I will check with roffman. will that help with the 'pinging'? 50 = 10k plus rpms, that's impressive. yea i've heard with just light widening and mild porting, plus matched intake, bigger carb/pipe you can really wind those kstars out.

The transfers I made huge you could go with bigger carb the ring gap was more than 015. this kit was used I cleaned it up that is it. all the star or treat kits I had or put on(6or 7) pinged none broke I always gear them to go 8500rpm or less at top speed

i have the og magnum filter, i will experiment with it.

untill the tank is cleaned this got put on teh backburner.

but tomorrow i think i will take care of the tank and continue the break-in process. i want to wind it out, but i'm 260 miles away from that... i rode my stock sachs tonight and i was like, wow this thing is quiet as a church mouse!!

i just take the screen out and put tiny bit of big foam in there and dont ride in dust storms lol

that metal air filter in the magnum tube can be restrictive, take it out and put panty hose or something less restictive. Dont be like me and use nothing lol

Because tha cylinder gulps the air so suddenly and then blows mixture back out the carb I can't use a filter and get good tuning. At lower Rpm when it blows back into the carb and in the air filter the next intake is all the more rich because the air in the air filter is already saturated with gas. Then at real high rpms the filter doesn't seem to keep up with air demand--------19mm Dellorto

K-Stars, DMP's, and TCCD's are kinda naturally rattle-y. Just loud kits like Andrew says.

Yea chris I got 3000 Miles out of my e50

70cc k-star

boss pipe

19mm phbg

red molassi filter

40 idle

w9 needle on the leanest setting

87 main jet!

dmp unstuffed crank! And the Roller bearing was what caused the death of this klt! I will now be changing my roller bearings after every 6 months!

16X40 Gearing also! I live in Sw florida so Jetting is really fucked here!

Running Gila now!

so update. after 3 weeks of breaking in the kit, alot of the rattlyness has gone away. switched to a 17t up front and now the clutch grabs at 22-24 mph, pipe starts hitting before the clutch grabs, really hits hard at 32 till 45, then you have to "finesse" it to i think 48 or so on the flats. plug chops are pretty useless, but when i pulled the plug to check for leaks/oilyness/etc it looked pretty good. while i was breaking it in, i varied the throttle position ALOT, hopefully to avoid giving it any flat spots. the other day i gave it its first long ride, 30 miles to medina and back, the last 3-4 miles were 45 mph roads, i held WOT for at least 3 miles, and said "fuck it if it breaks it breaks" but damn so far so good.

it seems to me, if you have the proma circuit, you can gear it out for higher top speed and if you tune the clutch correctly, you won't be missing alot of your low end. even with the 17t x 40 gearing i am still able to get up some hills from a dead stop with minimal clutch burnage.

thanks to everyone, all the advice givers, all the blasters, especially to roffman for the experienced tuning advice and setup.

here is the bike as it sits today: