I built my motor 10,000 miles ago and wanted to get some tips on what to do. Bike runs great but once hot it wants to kick back. The compensator is good. The trouble I'm having from what I here is the cam offers Alot of intake close.. And cams with vavle overlap are tough to start since the vavle is shut on start up. Lately things have got worse as old battery died and was forced to get a cheap auto zone battery and seems the starter is doing a small grind on start up.. Not sure if that's because of a underpowered battery or bad starter.. The battery is pretty lame because cold it don't have the CCM the stock battery had.. I'm soon to replace the battery with something better. As far motor any tips for a cam with vavle overlap and kickback? Also today I wanted to see if the bike would kickback with no spark so when the motor was hot I removed the wires and started bike.. Still kicked back with no plugs and then it started.. How can a motor start with no spark? Maybe a hot piece of carbon build up

2003 twincam 95 inch flat top 9.4.1 pistons 42mm mukuni carb big boyz ported heads Andrew's 21 cams stock ignition

 

Figure your cold cranking compression here and see if it's too much for your current setup.

http://www.bigboyzheadporting.com/TwinCamComp.htm

 

To hell with an online calculator

Put a compression tester on each cylinder to know how much pressure you are dealing with for certain.

A better, more powerful battery and heavy duty battery cables will help.

I think I would start there before replacing the starter or installing compression releases.

 

If you ONLY have 9.5 to 1 static compression- you need to spend money on what is not wrong.
You are about to start the guessing game and it will get expensive.
Do what PROT said- a compression test
Then?
Get a real battery with at least 500 CCA
What cam is in there?

 

Andrew's 21

 

For now I went to big boyz website and they had my cams and pistons listed came to 177... I tested other cams and the Andrew's 21 was the highest I guess because of the intake close. Is 177 Alot? Joe Minton did this same build in American rider magazine

 

180 LBS is not squat to turn over.
You are chasing other problems
BUT
Do a real comp test first as-
to get those online charts to read correctly most people do not have enough infomation.

 

 

This has been recommended many times in the past but here we go again...
When the bike is hot and before you try to start it, turn the run/stop switch to the run position. Then turn on the ignition switch and immediately hit the starter, not giving it time to prime with the fuel pump. This startup system usually works on high temperature starts regardless of cams.
If that doesn't do the trick then have your heads drilled for manual or automatic compression releases, but I don't really think that is needed with your setup.
Since your bike is a 2003, I would suggest you check you wiring for good ground and no corrosion in the hot wire or the ground to the starter.
Good luck

 

Thanks I do my own work but busy lately.. I got a harley gift card thinking thinking of going with 204 cams I'm thinking that will help because they have less vavle overlap.. And at that time I'll change to a good battery and new cables.. And I here the 204s sound sick