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Author Topic: Pilot screw size  (Read 963 times)
1NorthRyder
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*****
Posts: 206


Elliot Lake, Ontario, Canada


« on: March 02, 2019, 08:44:51 AM »

I need to replace my pilot screws as the ends a slightly buggered up and not easy to turn. I have had trouble finding out what the correct size is. The bike is a 2000 Interstate. I believe the correct OEM size is 35mm and some folks have increased the size to 38mm. I,ve googled it but haven,t found a clear answer. Thanks in advance for your help.
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1NorthRyder
Member
*****
Posts: 206


Elliot Lake, Ontario, Canada


« Reply #1 on: March 02, 2019, 09:42:54 AM »

Been reading more and believe I am wrong (yes I am man enough  to admit it, but don’t tell my wife) about the size, the 35 & 38mm I believe are the jets. I just want the screw, spring and washer that you lightly seat and then turn bake about 2 turns.
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mark81
Member
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Posts: 555


Cincinnati Ohio


« Reply #2 on: March 02, 2019, 10:24:49 AM »

The pilot screw is not a jet so that may be some of your confusion.


https://www.partzilla.com/product/honda/16016-MAS-670?ref=4f689702f5326aabebc627ea30468c281d13ef67

This is what you need
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1997 Honda Valkyrie
1981 Honda CB750 Custom
1NorthRyder
Member
*****
Posts: 206


Elliot Lake, Ontario, Canada


« Reply #3 on: March 02, 2019, 11:18:42 AM »

Thanks Mark, I found that part # just before you posted so all is good as long as I can get them delivered quickly.
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rug_burn
Member
*****
Posts: 320


Brea, CA


« Reply #4 on: March 02, 2019, 01:46:19 PM »

Guys-  help me out here a little-  are you discussing those screws on the carbs that adjust the main needle mixture?   

On my '97 the heads are circular with a kind of small flat, like a d-shape,  i think they were changed later.  That's what you're talking about, correct?   How do you turn these to adjust them with the carb on the bike?   Is there a tool for that?     

I made a tool to turn mine, and set all the carbs a little leaner than they were (about 1/8 turn) because the exhaust always smelled a little rich, but just how do you adjust those inaccessible screws without pulling all the carbs?
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...insert hip saying here..
Forge
Member
*****
Posts: 227

San Antonio, TX


« Reply #5 on: March 02, 2019, 04:11:28 PM »

My oem D screws were badly rounded so I replaced them with the K&L slotted screws.
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John Schmidt
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Posts: 15209


a/k/a Stuffy. '99 I/S Valk Roadsmith Trike

De Pere, WI (Green Bay)


« Reply #6 on: March 02, 2019, 05:20:30 PM »

When I pulled my carbs to clean some years ago, I used a Dremel tool with a cutting blade and turned them into something I could adjust with a flat blade screwdriver. Just don't hold them with bare fingers while cutting....unless you like blistered fingers.  Wink
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1NorthRyder
Member
*****
Posts: 206


Elliot Lake, Ontario, Canada


« Reply #7 on: March 03, 2019, 01:14:02 AM »

Guys-  help me out here a little-  are you discussing those screws on the carbs that adjust the main needle mixture?   

On my '97 the heads are circular with a kind of small flat, like a d-shape,  i think they were changed later.  That's what you're talking about, correct?   How do you turn these to adjust them with the carb on the bike?   Is there a tool for that?     

I made a tool to turn mine, and set all the carbs a little leaner than they were (about 1/8 turn) because the exhaust always smelled a little rich, but just how do you adjust those inaccessible screws without pulling all the carbs?

Yup, those are the ones. There is a tool from Motion Pro for adjusting when on the bike but still a pain in the ass.
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98valk
Member
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Posts: 13461


South Jersey


« Reply #8 on: March 03, 2019, 10:53:06 AM »

honda uses those screws on many of their carb bikes

honda tool to get, it was org listed for the cbr900.

it has a flexible spring head. been using it for yrs.

07MMA-MT3010B WRENCH PILOT SCREW
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

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