Got the bike on the dyno today. I expected a lot more power. Despite some big mods it didn't make much more than the first motor. 21rwhp. That's on a DynoJet and I don't know the manufacturer of the dyno the first engine ran on. It was still pulling hard at 14000rpm, though. That's a big improvement. I can't complain too much. That's comparable to a 1000cc carbureted, unblown sport bike making 210rwhp. I guess there are limits. I've gone back to a regular water pump (had an electric pump before but didn't trust it) and that's draining a little power. On the other hand, after the longest pull the head was still only warm and EGT went to 1150 degrees and stayed there. I'll settle for a little less power than expected and an un-fried motor, thank you.
With 17/35 sprockets it ran 152mph but with so little power I'll never be able to pull those gears on the salt. I'll try a 16t front sprocket and see how it does.
There's a big dip in power at about 11000rpm. It loses about 10% but then rebounds and holds steady thru 14k. I'm going to send a copy of the printouts off to Lectron Carbs for their advice. I doubt it's going to rebound like that on the salt.
I wish decibels were horsepower. Holy cow!!
In 2013 the Milwaukee Midget had a 1/2 hp dip in the bhp curve just before anticipated peak speed rpm, ~7800/7900. It was fine in 1st, 2nd, and 3rd, but it would not pull out of the "dip" in 4th, limiting the top speed by 3/4 mph we guesstimate. We worked hard to add a few bhp overall and get the "dip" out for 2014. (2 days on the dyno . . . .) Worked out well in the end . . . . .
as the engine would "pull" past the previous "stall" rpm. All those "little details" matter.
When power available = the total drag, you are done, and that is the top speed for that setup. There is a lack of power to accelerate the vehicle further.
Less power, un-fried motor, . . . . . . . always a wise choice in my world . . . . . . . .
Fordboy