Sprockets Space in Rag Joint & Chain Resistance

[Street Ryderz]

9k feet... Bring some extra jets or be ready to run a bit rich (not that bad.)

The other way around more alt has less air density so a leaner jet is required!

 

[gary55]

either way will work on the sprocket. The larger hole is probably the better of the two. You can then center it by measurements form rim to sprocket if you don't have a stand.

 

[gary55]

The other way around more alt has less air density so a leaner jet is required!

Naw he hit it. He's sayin it will run rich that high without rejetting, but it will be that bad. With the the stock #70 at 9000 it will be a constant 4 stroker. At 5400 and a #70 with the clip at the top most still 4 stroke.

 

[Street Ryderz]

Naw he hit it. He's sayin it will run rich that high without rejetting, but it will be that bad. With the the stock #70 at 9000 it will be a constant 4 stroker. At 5400 and a #70 with the clip at the top most still 4 stroke.

Ok now I see it lol!Sorry Frankenstein I mis read that!

 

[CrazyDan]

Pretty sure with jets and numbered drill bits the higher the number the smaller the size.
#61 (.0390") #62 (.0380") #63 (.0370") #64 (.0360") #65 (.0350") #66 (.0330") #67 (.0320") #68 (.0310") #69 (.0292") #70 (.0280") #71 (.0260") #72 (.0250") #73 (.0240") #74 (.0225") #75 (.0210") #76 (.0200") #77 (.0180") #78 (.0160") #79 (.0145") #80 (.0135")

 

[Street Ryderz]

Pretty sure with jets and numbered drill bits the higher the number the smaller the size.
#61 (.0390") #62 (.0380") #63 (.0370") #64 (.0360") #65 (.0350") #66 (.0330") #67 (.0320") #68 (.0310") #69 (.0292") #70 (.0280") #71 (.0260") #72 (.0250") #73 (.0240") #74 (.0225") #75 (.0210") #76 (.0200") #77 (.0180") #78 (.0160") #79 (.0145") #80 (.0135")

The higher # jets are bigger (more flow) than the lower # if you put in a #66 where the stock was #70 it's leaner there for smaller or (less flow).The use of nubered bits lets you gauge the size of orifise in an un marked jet!

 

[gary55]

Pretty sure with jets and numbered drill bits the higher the number the smaller the size.
#61 (.0390") #62 (.0380") #63 (.0370") #64 (.0360") #65 (.0350") #66 (.0330") #67 (.0320") #68 (.0310") #69 (.0292") #70 (.0280") #71 (.0260") #72 (.0250") #73 (.0240") #74 (.0225") #75 (.0210") #76 (.0200") #77 (.0180") #78 (.0160") #79 (.0145") #80 (.0135")

That's true on the bit numbering but not so on the jets. The jets are #68=.68mm #70=.70mm. On my micro bits I have a written index converting bit # to mm equivalents.

 

[CrazyDan]

It is based on fraction sizes, pretend a #66 is 1/66 and a #70 is 1/70.

Its not quite that but explains it easier

 

[Street Ryderz]

It is based on fraction sizes, pretend a #66 is 1/66 and a #70 is 1/70.

Your using s.a.e messurement when you should be using metric.

 

[gary55]

I am at a loss as to how they reference the bit # to the bit size. I think they just said we need a easy reference so lets pick a # and start here. I'm glad the jets match a actual measurement. I wouldn't be surprised if it was just to make a easy industrial standard so you could go to the tool crib and say give me a #80 instead of give me a one hundred and thirty five ten thousandths. Especially if you had to send your dumb assed apprentice who can't remember s**t half the time anyways.