121" to 136" Phazer questions.

[Devin yamaha man]

where did you measure your 15" from the original tunnel to the back of your custom aluminium ?

 

[canoehead]

15" is the overall length of the bumper extension. 10" is exposed

 

[Voda2000]

What is the inside diameter of the bumper tube?

 

[canoehead]

That I don't recall. Sorry

 

[Voda2000]

15" is the overall length of the bumper extension. 10" is exposed

I'm planning mine right now but if the extensions using are 7" then shouldn't the bumper need a 7" extension?

 

[canoehead]

I'm planning mine right now but if the extensions using are 7" then shouldn't the bumper need a 7" extension?

I'm not sure I'm following you? If you're planning a 7" extension you don't want the extension lip into the lugs

 

[Voda2000]

Sorry what I said really didn't make sense.

If the rail extensions are moving the rear axel back about 7 inches then wouldn't the bumper need to be extended the same length?

I guess what I'm wondering is why you need to move your bumper back 10 inches.

I'm not questioning what you did, just trying to get my head around the length required.

 

[canoehead]

I went with a longer lug track (1.5) and wanted to ensure adequate clearance. Didn't want to do it twice.

 

[Voda2000]

That makes sense. Thanks.

 

[Voda2000]

Well we did a whole pile of math and settled on a 9" extension.

 

[Devin yamaha man]

For 136"? Or 144"?

 

[Voda2000]

136". The rail extensions are about 8.5" and the track is 0.5" taller so 9" seemed to make sense. Plus it has space for a RotoPax gas can in the future.

 

[canoehead]

Yes, taking shape nicely..

 

[Devin yamaha man]

121 to 136 is 15 inches on the track. I think my extension was 9 inches on the bumper I believe

 

[Devin yamaha man]

Is this long enough?