June 1st, 2019, 08:20 AM | #1 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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for all those bread tie lovers out there
Cleaning all my spare jets, Mikuni and Keihin maybe 30-40? Out of them all I encounter 1 severely clogged pilot jet, 3-4 courses of ultrasonic and intense compressed air...still clogged....its a 38 Keihin (stock 250) pilot, now I'm determined to see wassup... I hit it with a .013" guitar string....first into the jet from top (still blocked) then backwards (into spray end of jet) a load of poop comes out (from top) featuring a broken, tiny remnant of soft wire (which was blocking the whole port) Very likely from someone using the ever popular bread tie.
Lesson to be learned...for pilot jets DO NOT buy into the "bread ties work great" BS. Or any other wire that is simply "convenient" and "fits". Its of great benefit to know the size of the opening involved, using the appropriate size steel guitar string (very rigid) you'll easily clear a pilot with no drama (or "leftovers"). Nope, no pics, you'll have to trust me on this one. A valid learning experience, and the pilot jet just may return to service some day! SAVED!
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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June 1st, 2019, 08:44 AM | #2 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Redneck pro tip: Cut the guitar string at a 45 angle for tough clogs but cut at a 90 for 99% of the rest of the job(s).
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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June 1st, 2019, 01:11 PM | #3 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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can be filed to a needle like point as well. be careful, will pass right through a finger or hand.
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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June 2nd, 2019, 09:08 AM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Guitar string’s very strong!
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June 2nd, 2019, 10:58 AM | #5 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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Absolutely, work really well, knowing your size before going in is imperative. Don't believe I've ever been unable to clear a clogged jet, however damage to the head frequently justifies bitchy removal and replacement. Gorilla unnecessary over tightening is the main offender. Firm but not stupid tight is called for.
Just the other day was forced to drill and e-ze out 2 Mikuni pilots way overtightened (with resultant damaged heads) in Ducati carbset (ebay spares, my property) Mikuni BDST38 for Ducati uses removable jet holders (pictured, hold pilot, main and starter jets) convenient to service jets. This removal precipitated the jet cleaning project...and led to this very "bread tie" thread/rant.
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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June 2nd, 2019, 11:15 AM | #6 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Is there a torque spec for these jets?
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June 2nd, 2019, 11:45 AM | #7 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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I've never seen any value....IMHO just use common sense with eventual removal in mind.
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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June 2nd, 2019, 12:21 PM | #8 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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June 3rd, 2019, 08:41 PM | #9 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Wow, never knew the specifics of guitar string, thanks!
Wonder if a super-strong, super-light frame can be made from the stuff...hmmm.... |
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June 4th, 2019, 06:22 PM | #10 |
Participant
Name: Dave
Location: South of Seattle
Join Date: Oct 2012 Motorcycle(s): '94 K75 std Posts: Too much.
MOTM - Aug '15
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That works out to about 53 lbs tensile strength, based on wire diameter.
Last futzed with by dcj13; June 4th, 2019 at 07:41 PM. Reason: Clarification... |
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