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Author Topic: pd42b Genuine Keihin Jets  (Read 1094 times)

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Offline gvarin7

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pd42b Genuine Keihin Jets
« on: May 31, 2018, 08:01:48 AM »
Happy to be on board here, great information everywhere.

I'm re-jetting my 78k but am having a difficult time finding Genuine Keihin Jets, especially pilot jets. A few sites I have seen that do offer them, do not display what applications they are for. For example, all they say is the part number and "series (21,22 etc.)". I have no clue what series I need or what pilot jets will fit into my carb. Anybosy know this information?
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Offline Bankerdanny

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Re: pd42b Genuine Keihin Jets
« Reply #1 on: May 31, 2018, 09:11:54 AM »
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"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline flybox1

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Re: pd42b Genuine Keihin Jets
« Reply #2 on: June 01, 2018, 08:58:58 AM »
Quote from: gvarin7 on May 31, 2018, 08:01:48 AM
Happy to be on board here, great information everywhere.

I'm re-jetting my 78k but am having a difficult time finding Genuine Keihin Jets, especially pilot jets. A few sites I have seen that do offer them, do not display what applications they are for. For example, all they say is the part number and "series (21,22 etc.)". I have no clue what series I need or what pilot jets will fit into my carb. Anybosy know this information?

why do you need new jets?
The original ones will be just fine unless you are changing your intake or exhaust setup, and even if you do, the originals might be close enough..... unless you are going pods and a completely unrestricted exhaust.

 ^^^^the info Bankerdanny posted is good.  jetsrus are the best aftermarket jet mfr.  original keihins are nla. 
for a 78 750...#35 pilots are stock.  #100 mains are stock.
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline Bankerdanny

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Re: pd42b Genuine Keihin Jets
« Reply #3 on: June 01, 2018, 09:57:07 AM »
According to JRU they are selling actual Keihin jets as well as a less expensive "OEM style" option.
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"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline bryanj

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Re: pd42b Genuine Keihin Jets
« Reply #4 on: June 01, 2018, 11:01:20 AM »
PD carbs have "Push In" pilot jets that do get clogged solid, especially if the bike is unused for a while(sometimes as short as a few weeks) I know Sirius in Canada do the pilots as well
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline dusterdude

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Re: pd42b Genuine Keihin Jets
« Reply #5 on: June 01, 2018, 04:48:20 PM »
Bryan,not all are push in.77 750 jets are screw in

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Offline bryanj

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Re: pd42b Genuine Keihin Jets
« Reply #6 on: June 02, 2018, 04:34:10 AM »
Did the 77 have PD carbs? all the PD's in the UK were push in, used to cause nightmares with used bikes on the showroom floor!
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline dusterdude

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Re: pd42b Genuine Keihin Jets
« Reply #7 on: June 02, 2018, 08:07:42 AM »
Yes,at least the u.s. bikes did

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mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3
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