Pop-Off Test

[phoophan]

I'm about to rebuild both carburetors in my 1995 GTX. I've read countless posts and downloaded a bunch of documents related to the Mikuni rebuild kit. My question is about the Pop-Off test. If I'm doing a complete rebuild do I really need to do this test? If I'm using a Mikuni kit with all new parts I don't see why this test is necessary. I need someone to convince me the test is absolutely necessary.

Also, a needle valve is not included in the rebuild kit but some posts say it's a good idea to replace them if doing a rebuild.

Any/all comments or suggestions would be greatly appreciated.

 

[shakedown]

When you get your new carb kit reuse your old popoff spring, the kit will not come with the one you need unless you special order it. the spring does not go bad, and yes it is very important to set the popoff, if you dont have a tester there are there are threads on here telling you how to make one.
The rubber tip @ the end of the needle will wear out over time, and thus will not seat properly letting fuel slip by

 

[nswillin]

:agree: You do the pop off test to make sure you are good with the rebuild. Any time you put new needles and seats in the carbs you will need to do the test to make sure everything is with in spec. Also it is good to test for leaks after you have spent the time and money on the rebuild. Make sure you order the Mikuni brand rebuild kits new needles and seats and nothing else.
Here is a link on how to make a tester:
http://www.seadooforum.com/showthread.php?t=12624

 

[timmyboy76]

:agree: with above post, but,m as long as your using the OEM n/s spring, and dont bend the "tang" tab, that lifts the needle, then "no", in my opinion, dont need to do test.

Make sure, the "tang" is level with the inner carb plate, install the OEM spring, lube the n/s assy with oil, and also inspect the needle, if theres "grooves" on it, then you'll want to replace it, but no grooves, then put all together and i'll bet, it'll work awesome.

Where yuo at in CA, yuor avatar pic, looks like the cliffs we were jump'n off in Lake Mohave..:reddevil:

 

[phoophan]

Thank you all for your reply.

That picture was taken at the "palm tree" just before Hoover Dam. If you don't know where the palm tree is, it's all by itself on the right side of the river so you can't miss it. There is a hot spring coming out of the rocks just to the right of where I'm standing. The water coming from below Hoover Dam (Lake Mead) is about 48 degrees and the hot spring is 107 degrees. Where I'm standing is a very nice medium between the two. The dam is around the corner to the right just behind me.

Every year we make the 63 mile run (126 miles round trip) from Kathrine's Landing(Telephone Cove) to Hoover Dam. We usually leave at sunrise when the water is glass. There is nothing in the world quite like sunrise on Lake Mohave. We used to go right to the base of the dam and touch it but after 9/11 it's not a good idea to be on a watercraft going 60 mph straight towards the base of Hoover Dam.

 

[timmyboy76]

yeah, know where you talk'n about, but hadn't heard it called "palm". We go to "Willow Beach", its about 15miles south of Hoover Dam. From the launch, theres a kik-a** beach area that we chill at, but damn kayakers always bomb'n on/around us. Guess its the launch for them. We'll take that ride to the dam, but the water, forget it, freeze ur nu** off, but roll down river, and ahhhh, wata warm...now with boats, probably find a cove/lagoon, so were not pissing off the kayaks.

Just got back from Mohave, and was think'n of roll'n to Hoover, but didnt think we'd make it. 63miles you say...think i'll stick to Willow, to bomb to Hoover....:cheers:

 

[phoophan]

That's why we leave at sunrise when the water is glass. The ride back on Mohave can be a bummer when the wind picks up after noon. If we don't mess around at Willow Beach or Cottonwood then we usually get back to Telephone Cove around 1:30pm. The ride from Willow Beach to the dam has got to be the most amazing ride in the world. The water is crystal clear and even though you're cruising along at 60 MPH it looks like you're going to hit the rocks on the bottom of the river. The first time I did it I freaked out and couldn't go more than a crawl. We always respect the kayackers and stay as far away from them as possible or slow down if necessary.

Lake Mohave rules!