Ok... Here it is AGAIN.
The original Ruima Stuffer crank (44mm stroker). Stage6 Clutch, Jasil Top Racing Var. Scorpion pipe (Thanks Cynyo).
MHR secondary gear set (Thanks Steve). Diabolos front, and rear. Malossi brakes front, and rear, Agility dual piston caliper. Bando belt. OKO 24mm flatslide. Pod filter.MHR intake. Boysen home made 2 stage reeds. All that custom case porting.
The Polini Corsa did 82MPH at just a partial tune. I ran out of time (and clutch pads) before I could tune it correctly.
Had to run as is, and got 82@ 13500 rpm.
I put the bike up for a few weeks, and decided to down gear. I had both the Malossi primaries, and the MHR secondaries installed. Final ratio was 6:1 or 5.7:1 top be exact. To brutal to ride on the street.
I pulled out the primaries, and rode it 4-5 times. One gallon of premix lasted about 15 miles so it was like filling a car once a week. I went thru 60 gallons, ad all the Spectro Platinum 32 I had stockpiled at 14 dollars a pint.
Soooo new bug in my ass. Time to pull it out for this years Speed Week in October.
The Corsa has just barely broken in, and is a GREAT top end performer. 14000 is no joke just under your baby maker. I decided I need more torque to stop slipping the clutch below 40MPH. More torque means more cc's No way around it.
BacK to JiangWayne, and the Tadia Motors 50mm jug. My last 50mm was a Rumia. Broke both the skirts in a month.
I spent 5 hours on the phone with Kevin. He is their new Rep.. We worked a deal. He had them send 4 cylinders so I could hand pick the best of the best that they picked.
Now the fun begins... I copied the porting from the Corsa into the Tadia, and let loose with the dremel. in an hour I had raised the side inlets 4mm, and opened them both directions by 12mm total. I cleaned up the boost but left it as is for shape because it is the largest boost port of any of the Dio cylinders. The exhaust I simply polished. It was perfect out of the box.
One stock base gasket, one note paper base gasket, and oe 0.4mm aluminium shim got me a squish of 0.7mm. Right in between detonation, and no real power.
I pulled the spark plug, and added an ounce of Spectro Platinum. More fun... I spun that engine for 15 minutes with a 1/2" drill, and a socket on the crank. It got to where I could sin it by hand. Beautiful.
Now one ounce of premix ready to go... Spun it until the vapors stopped, and installed the plug.
Pulled the CDI to verify the timing curve I had for the Corsa. 15* for 0 -1500 rpm / 25* from 1501-5000 / 32* from 5001-9000 / 35* from 9001-9500 / 20* from 9501-11000 / 25* from 11,001-14,000.
Plugged the CDI in, installed the kill switch, one kick! Warmed it up for 2-3 minutes, adjusted the idle, and found the pilot was too rich. 1/2 a turn on the air screw.
Shut it down, rejetted (50 pilot), three kicks, and perfect. 2 1/2 turns on the air screw.
Tried to ride, and too lean on the mid/needle/main. Move the needle up, still lean. Bigger main.. too rich. Original main (150), and a thinner needle. Better but still too lean. went to a straight thin needle (no taper), perfect.
Went to leave the drive, and shot dirt all over my porch. TORQUE!
Babied it for a few laps around the block, and hit Hwy98. 50/60/70/80mph, and still not at WOT. Turned around, 40-50 home, and shut it down.
Retorqued all the bolts, tightened the intake, and carb., back on the loop. 60-70MPH at 1/2 throttle. Thats 10MPH better than the Corsa.
Went to my buddies in Eastpoint. 15 miles of varied throttle. We had a beer, and he wanted to see how fast it is.
He got in the van, and I rode in front of him. Around 85 on the speedo I could hear detonation. Timing is too far advanced. I pull over, and close the air screw stalling a idle but just enough fuel to cool the detonation at 85MPH.
87/88/89 on the speedo, and I back out. The Yamaha speedo I installed goes to 90. It's off by 3MPH high. The cops radar verified this lat last years Speed Week.
Jonny tells me the speedo in his van said 96MPH. We laughed, had a few more beers, and here I am. Back home with my bike cooling off.
I have the bike running better than ever. The CDI will be reprogrammed tonight, and the carb reset.
I'll post up later tonight to get caught up. It's been brutally busy for me, and hotter than hell. I can't figure it out but somehow I'm gaining weight, and all I do is sweat all day. Maybe it's the beer and hotdogs. I doubt that tho.
That's good food right there.
Peace!
