How to get more bottom end
Road Warrior
Joined: Jun 2009
Posts: 1,943
Likes: 3
From: NYC
ok so I got my back back good as new.. i have incredible top end from like 3 to 6 grand.. but crap for low end. i practically have to down shift to 4th at 60 to pick up speed.... im trying to figure out how i could get some more bottom end to it.. this is what has been done to it...
flywheel was lightend and balanced
ev 59 cam
crane ignition
ported heads
10.5 to 1 compression
s&s oil pump and pushrods
kibblewhite valves
barrnett clutch plates and spring
i still have the stock carb and have dumper straight pipes on there...
i just replaced the chain and sprocket in the primary... i wanted to put diffrent gear to get more lower end but the chain was too tight so we had to put a new stock sprocket back on...
thanks for the help
flywheel was lightend and balanced
ev 59 cam
crane ignition
ported heads
10.5 to 1 compression
s&s oil pump and pushrods
kibblewhite valves
barrnett clutch plates and spring
i still have the stock carb and have dumper straight pipes on there...
i just replaced the chain and sprocket in the primary... i wanted to put diffrent gear to get more lower end but the chain was too tight so we had to put a new stock sprocket back on...
thanks for the help
they guy that ported my heads is the guy that built my motor... and he also reccomended the ev59.. i ran outta money and wasnt able to put a new carb on i was thinking of going with a 45 mikuni...
he also says that if i put a 2 to 1 on that i would have a significant torque gain.. but i dont like the look of that...
so i think what im gonna do is keep the ev 59.. and start by putting on a bigger carb... i dont want to destroy my fuel economy by changing gears... or so i hear
he also says that if i put a 2 to 1 on that i would have a significant torque gain.. but i dont like the look of that...
so i think what im gonna do is keep the ev 59.. and start by putting on a bigger carb... i dont want to destroy my fuel economy by changing gears... or so i hear
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Road Master
Joined: Sep 2008
Posts: 799
Likes: 8
From: central Il
just had 21 tooth and chain installed today and wow what a difference only have 40 miles so far I wanted a little more of what I already had.
Last edited by shakrr; Apr 11, 2012 at 07:56 PM. Reason: wrong tooth
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Harley used to sell an SE primary kit of 21T and shorter chain for TC88s. I fitted one to my Dyna. Gives a 19% increase in rear wheel torque, cheapest tuning aid out there! Reduced gearing to around 20mph per 1,000rpm, which I found a real improvement. Got the motor above an annoying vibration patch just under 3k rpm, when travelling on the open road.