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Author Topic: Under tank maintenance.  (Read 901 times)
thfrider
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Posts: 17


« on: October 26, 2015, 11:59:28 AM »

I have the tank and air box off of my 1998 Tourer.  Looking around, I see a lot of old looking rubber goods.  What should I look at replacing?  I have already ordered fuel lines, but what about vacumn lines and such.  Also, do you need to go to Honda for these lines or can I go to the local auto store? Any pointers on changing some of these tubes would be appreciated.
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Chrisj CMA
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Posts: 14777


Crestview (Panhandle) Florida


« Reply #1 on: October 26, 2015, 12:28:57 PM »

Vacuum line is5/32 ID. Get it at any car parts place
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hubcapsc
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Posts: 16781


upstate

South Carolina


« Reply #2 on: October 26, 2015, 01:41:54 PM »

I have the tank and air box off of my 1998 Tourer.  Looking around, I see a lot of old looking rubber goods.  What should I look at replacing?  I have already ordered fuel lines, but what about vacumn lines and such.  Also, do you need to go to Honda for these lines or can I go to the local auto store? Any pointers on changing some of these tubes would be appreciated.

Any of the vacuum lines could be hurting you, so it is worth putting new ones in there.

The chrome runners from the carbs to the top-ends have O-rings under them.

It wouldn't hurt to replace those O-rings either, particularly if you see "tobacco stains"
around the base of the runners.

Here's the pointer - if you have a hard &^!!%$! time getting your hands in there to
work, it is a lot easier to get in there with one or more runners removed.
If you remove any of them, having new O-rings to replace the old ones is good for
avoiding possible do-overs.

Some people "desmog" their bikes, which removes some vaccum lines. Some
people change out the vacuum operated petcock with ones that aren't vacuum operated,
which removes a vaccum line. Unless you've owned your bike since new, you'll have to
sort out whether any of that has been done...

I haven't replaced my fuel lines... the "other" (non-petcock) end of the fuel line
might be hard to get to...

I replaced my carb drain lines last winter... it won't make your bike run better (like
vacuum lines might) but mine were rotted and icky... all that stuff is routed
"on-purpose" so take your time... and maybe even some "before" pictures...

Let us know how it goes  cooldude

-Mike
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sandy
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Posts: 5388


Mesa, AZ.


« Reply #3 on: October 26, 2015, 05:02:04 PM »

The original vacuum size is 3.5mm. But 5/32nd will work. The O rings under the intake runners is a #123 O ring and get them in Viton. You'll never have to replace them again. If you can find the vac lines in Viton, the same advice holds.
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thfrider
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Posts: 17


« Reply #4 on: October 26, 2015, 05:31:49 PM »

Thanks guys, let me do some looking around.  Did notice that what I was calling a vacuum line to the carb. is actual a drain line and at least one is split so I'm thinking the vacuum lines are in the same shape. 

Hey Chrisj, I see you are in Crestview.  I'm originally from Cantonement but have been stuck in Louisiana for 40 years.

I'll keep ya'll informed, but I'm taking my time on this one.

Thanks
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xman
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Posts: 298

Lincoln Park NJ, Valk Home Lackawaxen PA


« Reply #5 on: October 27, 2015, 03:55:58 PM »

I got 10' of 3.5 mm thick wall silicon vacuum line on amazon, cheep.  I'm going to pull the tank soon and replace them.

i asked before if I could get to the lines from #3 and 5 to the pair valve, without removing the air box. You guys say yes, but I'm not sure.
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