Topic: Number of chambers on the 341 exhaust

[plippo]

Guys,

need a clarificaiton here. See a previous consideration from Hondaman:
HondaMan:
What mainjet size do you have? On a K2, I would expect either a 100, 105, or 110: the early K2 had 110, the "middle" of the production had 105, and just before the K3 appeared, they had 100, along with the short-production 7-chamber exhaust pipes. You can see how many chambers your mufflers have by counting the little spotweld dimples along their length: inside the pipe, there is a baffle at each dimple. The HM341 pipes came in 4, 5, and 7-baffle versions: the set I bought last year (new) has 5, for example. My original ones had 4 baffles, the carbs had 110 mainjets. When I replaced the pipes in late 1972 because of an accident I had, they were the 5-baffle types, and I had to go to a 105 mainjet: Honda had also done this in production about that same time. Today, at altitude, I run with 100 mainjets (6000 feet where I live), and I don't have the carbon issues.

see attached pics - which dimples do I count?

[65Ch3v3LL3]

He is referring to the rows of dimples. Each dimple is a spot weld. Each baffle in the muffler is a disc and its spot welded all the way around. So where you see several dimples in a row that is one baffle, go along the muffle a little further down and you will see another row, that is another baffle.

[plippo]

He is referring to the rows of dimples. Each dimple is a spot weld. Each baffle in the muffler is a disc and its spot welded all the way around. So where you see several dimples in a row that is one baffle, go along the muffle a little further down and you will see another row, that is another baffle.

Ok So the first image show 3 rows of dimples, ie 3 chamber. what puzzled me is that he mentions 4,5,7 chamber, but not 3 chambers for early K2...I am rebuilding and found a 105 jet, so I guess I will keep that and test later if it is too lean...?