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Old 12-11-2012, 08:54 PM   #16 (permalink)
Bad Disposition's Avatar
Join Date: Sep 2010
Location: San Diego, CA.
Posts: 509
Bad Disposition wants to know Dino or Syn?
New 120 Bulid

Originally Posted by wurk_truk View Post
FMJ... all I can say is to PLEASE listen to two of the very top tuners going... break the bike in on a dyno. Your last post was no more than unknowing BS. If you have no dyno close by, then by all means do the S&S method, but if you DO have a GOOD dyno close by, the best bet is to break in on the dyno. A dyno break in monitored the fuel from the very beginning... if the bike is too lean for those 500 miles, you can burn it up, and if it is too rich, you can wash the cylinders with gasoline and NEVER achieve proper ring seal AND cause more damage. Herko and Stroker are the very top of the class dyno tuners if you didn't know. I would put those two guys against the best in the country... hell they ARE the best in the country, IMHO.

The problem arises with 'starter maps' for new builds if YOU have no means to monitor the fuel AFRs. Do you? IF not, then why even think of doing this? Too many maps are 'off' enough to run lean/rich... that I, myself would never chance this on an expensive build. (I have purchased all kinds of tuning tools to be able to check my own AFRs to eliminate even the hint of crappy feuling.)

All of that, that you have 'heard', comes from the days bikes had carbs. One would guess, and then install one larger jet for slight increase in fuel. Todays EFI dials things way better, but... a map that is not correct can also damage a bike fairly quick, sometimes.

I personally use the S&S method, but monitor fuel very closely. This is due to my having no GOOD dynos close by.

And... a dyno break in does NOT run a bike full bore all out balls to the walls, either. A good dyno operator will adjust the fuel TO MATCH THE BIKE and will keep all the revs to what is needed, and then you come back later for a full tune.
Very well said Wurk!

Happy Holidays!
08 ULTRA /120 CC Mutt
4.060" big-bore cylinders.
4-5/8" stroke S&S Flywheels
Compression 10:7
T-Man 660SM
R&R Roller Rockers
S&S Lifters (HL2T with limters).
R&R Stage IV CC Heads
HPI 55 mm Throttle Body/1.800 intake
HPI Injectors
Evolution Diamond Terminator Clutch Basket
Bandit Sportsmen Clutch
Bassani Road Rage 2:1 Header
Dyno 143hp/142tq
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Old 12-12-2012, 02:34 AM   #17 (permalink)
Join Date: Mar 2004
Location: Michigan
Posts: 8,547
FXDRYDR is still riding a stock bike FXDRYDR is still riding a stock bike
Originally Posted by FLTR2008TRIKE View Post
Here is one of the best tuners in the country.>>
Fixed it for you.

Stroker, Herko, Doc - all top guys and relatively close.

Originally Posted by Agroach View Post
Doc called with an opening - going Thursday.
Smart move. You'll be real glad you did. Let us know how it goes.
2003 FXD
Black, chrome & loud.

Last edited by FXDRYDR; 12-12-2012 at 02:39 AM.
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