Search found 11 matches

by Mike's bikes
Wed Nov 24, 2021 8:15 pm
Forum: 750 Paso
Topic: 1988 Paso - First Ride
Replies: 9
Views: 6238

Re: 1988 Paso - First Ride

The bike looks and sounds great, Richard. I especially like the mufflers. It's good to know there is a more attractive yet stock looking alternative to the originals.
Mike
by Mike's bikes
Tue Jun 01, 2021 6:52 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

Goldstar500, are you changing the auxiliary venturi from the original 3.5 to 4.5, or just the jets? Do you have a BSA Gold Star 500? Coincidentally, I have a 1961 500cc DBD Gold Star.
by Mike's bikes
Fri May 14, 2021 9:12 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

My bike had a K&N filter element in the standard airbox when I got it. I changed that to an OE type paper element, making sure that it stayed in the sealing channel when the cover was clipped on. That change alone made a noticable difference. I mention it because the aftermarket cotton mesh elem...
by Mike's bikes
Wed May 12, 2021 2:07 am
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

murphus, have you measured your main venturi ID? Whether it is 34 or 36mm may make a difference in the jetting.
by Mike's bikes
Tue May 11, 2021 12:51 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

The Weber manual says to "reform" the main jet seating at the bottom of the emulsion tube using the special Weber tool. I'm not clear what's being done, and is it necessary when installing new emulsion tubes and jets? Another thought, the manual may be referring to reforming the cone shap...
by Mike's bikes
Mon May 10, 2021 11:07 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

I do not know what the Weber manual means by "reform". I had no trouble separating the main jet from the emulsion tube ... it just pulled off and the emulsion tube was undamaged. I didn't need anything but a couple of pair of pliers to lightly grab the e-tube and jet. My bike has low milea...
by Mike's bikes
Mon May 10, 2021 5:10 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

I used a 3-corner scraper and then an exacto knife to remove the staked material. The auxiliary venturi came out fairly easily using a small aluminium drift against the support arms, working side to side.
by Mike's bikes
Fri May 07, 2021 7:37 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

Thanks for posting the info. I read Romus and Higgy's writeup and using the tall 4.5 venturi, interesting that you've apparently had good success using the "standard" 4.5, which is readily available, whereas the tall 4.5 is not, at least near as I can find. I'd really like to see if I can...
by Mike's bikes
Fri May 07, 2021 7:19 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

Frank.61 wrote:Hi Mike,

1 question: which emulsion tubes does yours have?

Frank
F44 emulsion tubes
by Mike's bikes
Wed May 05, 2021 2:58 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

Re: US Spec P750 Weber Recalibration

Thank you, Gerhard, , I thought the differences between US and Euro spec carbs were the jet and venturi sizes. My venturi definitely measures 34mm ID, though I don't remember what number is stamped into the carb body. The unreliable nature of printed specifications is why I refer to such information...
by Mike's bikes
Tue May 04, 2021 6:08 pm
Forum: 750 Paso
Topic: US Spec P750 Weber Recalibration
Replies: 26
Views: 19634

US Spec P750 Weber Recalibration

I know that this is a well worn subject, but I have not seen a report of successfully recalibrating the originally equipped Weber carburetor on a US spec P750 model. I have gotten mine to run very well using only currently available Weber jets and parts, with no soldering or drilling of emulsion tub...