Monoblocks vs Concentrics 650SS

elefantrider · Thursday at 2:00 AM

I've decided just to make life easy and just run concentrics like the later 650ss had.

Looking at filtration options now. The Atlas air cleaner would work but it looks like a PITA and heavy.

There is always the option of short belmouths with screens and gauze.

baz · Thursday at 3:44 AM

elefantrider said:
I've decided just to make life easy and just run concentrics like the later 650ss had.

Looking at filtration options now. The Atlas air cleaner would work but it looks like a PITA and heavy.

There is always the option of short belmouths with screens and gauze.

Screening a belmouth is known to cause a richer mixture I believe?

elefantrider · Friday at 1:52 AM

Any other filtration ideas? I believe Uni filter makes the widest range of foam filters.

Clamp-On Air Filters : Uni Filter

The Best Air Filters on Earth!

unifilter.com

worntorn · Friday at 8:47 AM

I have concentrics and a K&N on the 650ss. It is tight but just fits.

Glen

elefantrider · 2024-10-21T04:09:33-0600

What, if anything, did the 650ss have originally?

Mike40M · 2024-10-21T07:24:47-0600

elefantrider said:
What, if anything, did the 650ss have originally?

Twin carbs, early Monoblocs, late (-67,-68) Concentrics.

baz · 2024-10-21T07:46:42-0600

Mike40M said:
Twin carbs, early Monoblocs, late (-67,-68) Concentrics.

Did they use a chopped mono on the right?
Or a 689 like an atlas ?

Mike40M · 2024-10-21T08:19:48-0600

baz said:
Did they use a chopped mono on the right?
Or a 689 like an atlas ?

650SS chopped,

savingclassicmotorcycles · 2024-10-21T10:32:27-0600

What Mike said

chopped on the 650ss before the Concentrics, I’m running brand new Amal chopped on mine with the insert sleeves to sleeve the intakes down had them on for 4 years n 4 winters n been great.

If you anyone gets new premier Concentrics for the 650ss make sure they fit the right pilot jets had me chasing my tail when I used to have them on the 650ss till I double checked them.

Switched over to the Monoblocs as mines a very late 66’ reg 67 she originally was spec’s with monoblocs

i bought from the original owner, had a single carb conversion on it. N stuck the premiers rejetted on my early 68 Commando

elefantrider · 2024-10-21T11:08:54-0600

I meant to write what filters did they have originally?

Monoblocks vs Concentrics 650SS

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