Throttle Body Sync

afmeyer · 09-14-2012, 09:44 PM

Most of the threads are years old. What is recommended now for throttle body sync? The twinmax is available but the Harmonizer doesn't seem to be available. There is also the Carbtune and the home made manometer.I'm looking for suggestions. Is there anything new or is one of the devices I mentioned very good?

gn77b · 09-15-2012, 04:21 AM

FWIW, I'm using the DIY version (clear tube filled with oil) with good results.

VStromTom · 09-15-2012, 06:07 AM

Initially I used the homemade manometer but didn't like it because of rapid changes to the columns of liquid with the slightest change in balance. Flow restrictors may have reduced that problem but I didn't like it, and the damn thing was cumbersome to use and store. I now use a TwinMax with great results. Some hamfisted guys gripe about sensitivity and having to change the 9v battery each year but I have no problem with that. I recall seeing something about the harmonizer, which seemed good, but don't know anything else about it. Good luck. Carb stix are an old tried and true tool/method, but I haven't used it.

Andrew · 09-15-2012, 09:19 AM

Quote:

Originally Posted by afmeyer

Most of the threads are years old. What is recommended now for throttle body sync? The twinmax is available but the Harmonizer doesn't seem to be available. There is also the Carbtune and the home made manometer.I'm looking for suggestions. Is there anything new or is one of the devices I mentioned very good?

I used to use a TwinMax, but threw it away in favor of a manometer tube setup, which was much more reliable and accurate. But I now use Grok's Harmonizer, which I feel is superior in every way for balancing throttle bodies.

trc.rhubarb · 09-15-2012, 10:33 AM

I have the carbtune... I like it because it's very dampened. It's also a little bigger and easy to see while bent over and adusting the cables while holding the throttle and watching the tach all at the same time... reminds me of playing twister

LexLeroy · 09-15-2012, 02:20 PM

Quote:

Originally Posted by gn77b

FWIW, I'm using the DIY version (clear tube filled with oil) with good results.

+1 on the DIY manometer - mine's filled w/ blue 2-stroke oil and I use it every oil change.

bob393 · 01-16-2013, 10:51 AM

Quote:

Originally Posted by LexLeroy

+1 on the DIY manometer - mine's filled w/ blue 2-stroke oil and I use it every oil change.

+2 use red trans fluid in mine. I found kinking the tube at the bend dampens it just fine for my use.

duck · 01-16-2013, 11:53 AM

For two cylinders a TwinMax works fine.

I use a Carbtune now because it does all three or four cylinders at once.

fast4d · 01-16-2013, 01:29 PM

some bikes (rotax/aprilia v-twin for ex) have a map sensor on each TB so you can get it in the ballpark......no tubing necessary!

bwringer · 01-17-2013, 04:51 PM

The Carbtune is fantastic. And you can sync 2, 3, and 4 cylinder bikes.

Your friends will gather around to watch you tear down and tune up all kinds of motorcycles...

What sort of conveyance are you synchronizing, anyway?

09-14-2012, 09:44 PM	#1
afmeyer ^OP Adventurer Joined: Apr 2003 Location: NC Oddometer: 56	Throttle Body Sync Most of the threads are years old. What is recommended now for throttle body sync? The twinmax is available but the Harmonizer doesn't seem to be available. There is also the Carbtune and the home made manometer.I'm looking for suggestions. Is there anything new or is one of the devices I mentioned very good?

09-15-2012, 10:33 AM	#5
trc.rhubarb Beastly Adventurer Joined: Nov 2011 Location: Concord, CA Oddometer: 1,142	I have the carbtune... I like it because it's very dampened. It's also a little bigger and easy to see while bent over and adusting the cables while holding the throttle and watching the tach all at the same time... reminds me of playing twister __________________ 2007 BMW GS Adventure 2010 Harley Ultra Limited 1975 R90/6 Follow me here

01-16-2013, 11:53 AM	#8
duck PsyKotic Waterfowl Joined: Mar 2004 Location: Seattle (Berkeley with rain) Oddometer: 9,971	For two cylinders a TwinMax works fine. I use a Carbtune now because it does all three or four cylinders at once. __________________ 93 K1100LT, 94 K1100RS, 86-97 K75F (K75/100/1100 Frankenbrick), 91 K1, 05 KTM 450 SMR IBA #17739 (SS1K, BBG, 50CC) http://home.comcast.net/~smithduck/BMW_Tours.htm

01-16-2013, 01:29 PM	#9
fast4d Beastly Adventurer Joined: Jul 2007 Location: Los Angeles, CA Oddometer: 1,549	some bikes (rotax/aprilia v-twin for ex) have a map sensor on each TB so you can get it in the ballpark......no tubing necessary! __________________ Alan 2011 KTM RC8R 2012 BMW S1000RR 2000 Kawasaki ZRX1100

01-17-2013, 04:51 PM	#10
bwringer Gimpy, Yet Alacritous Joined: Jan 2008 Location: Indianapolis Oddometer: 1,722	The Carbtune is fantastic. And you can sync 2, 3, and 4 cylinder bikes. Your friends will gather around to watch you tear down and tune up all kinds of motorcycles... What sort of conveyance are you synchronizing, anyway? __________________ 1983 Suzuki GS850G, Cosmic Blue 2002 Suzuki Vstrom DL1000, Midnight Blue 2005 Kawasaki KLR650 - Turd II, The ReTurdening "Do not crinkle your food wrappers loudly. Be considerate to others, or I will bite your torso and give you a disease."

09-15-2012, 04:21 AM	#2
gn77b Gnarly Adventurer Joined: May 2010 Location: RO Oddometer: 135	FWIW, I'm using the DIY version (clear tube filled with oil) with good results.

09-15-2012, 06:07 AM	#3
VStromTom Beastly Adventurer Joined: Aug 2004 Oddometer: 1,576	Initially I used the homemade manometer but didn't like it because of rapid changes to the columns of liquid with the slightest change in balance. Flow restrictors may have reduced that problem but I didn't like it, and the damn thing was cumbersome to use and store. I now use a TwinMax with great results. Some hamfisted guys gripe about sensitivity and having to change the 9v battery each year but I have no problem with that. I recall seeing something about the harmonizer, which seemed good, but don't know anything else about it. Good luck. Carb stix are an old tried and true tool/method, but I haven't used it.

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