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General Category => Introductions => Topic started by: Theremikegoes on October 21, 2012, 07:11:57 PM

Title: Lurked for a bit, thanks for the info...
Post by: Theremikegoes on October 21, 2012, 07:11:57 PM
Bought an 89 a few weeks ago... thought it only needed fork seals and a run in(idle was so so) ended up
needing new fork tubes because of some strange grinder gouges that were hidden by the dust wipers.  While I was in there I did the rpm fork valve and .85 springs.  Rode through it while the idle jets unclogged themselves-Idle jumped 1000 rpm or so for each of the two that were clogged, haha.  Then I got the uni pods from RPM and Randy helped me with new jets.  Ditched the airbox-love the intake roar, and it runs beautifully. Also have some gold spots on the way-thanks ebay $45 w/stainless hoses, and all the fluids have already been replaced-along with a clutch slave rebuild.  Also built some crash bars, added some HID fog lights, and tusk grip warmers-its a commuter.  Personal stuff-I'm an engineer by school and I break stuff for the navy for work,  for fun I build stuff-vehicles, motorcycles, whatever...

I've got a few questions, and of course, pics...
I'm 5 turns out on the mixtures and could probably go more-started worrying that they'd fall out or shift- how far is too far?  I was thinking I should go from 40's to 42.5 idles, and I'm on 117.5 mains, no shim on the needle.  Would that mean I should go up on the mains or shim as well?  Planning on slotting the ignition for the 4-6 degrees and thinking I might need to up on mains when I do that. Hard to measure 'how it runs' over the web, but the front gets very light in 2nd at 7k rpm or so...
(http://i3.photobucket.com/albums/y83/cmikeblank/CIMG7162.jpg)
(http://i3.photobucket.com/albums/y83/cmikeblank/CIMG7161.jpg)
(http://i3.photobucket.com/albums/y83/cmikeblank/CIMG7160.jpg)
(http://i3.photobucket.com/albums/y83/cmikeblank/CIMG7159.jpg)
(http://i3.photobucket.com/albums/y83/cmikeblank/CIMG7158.jpg)
Title: Re: Lurked for a bit, thanks for the info...
Post by: FJmonkey on October 21, 2012, 07:19:00 PM
Another engineer type with a manual tube bending tool just sitting in the garage. Not quite enough to make your own engine guards but maybe some custom FJ parts... Welcome to the Kookaloo zone.... 
Title: Re: Lurked for a bit, thanks for the info...
Post by: Theremikegoes on October 21, 2012, 07:28:12 PM
haha, thanks, I was wondering what the kookaloo thing was all about.... until I cleaned and rejetted.

And those are home built crashbars... thats why the garage is a mess, I had just finished, haha.  I copied the renntecs to a point-the rear of mine are machined down so they actually sit inside the frame.  They're 3/4" .120 wall, just had to take .05" off them so they'd slide in.
Title: Re: Lurked for a bit, thanks for the info...
Post by: FJmonkey on October 21, 2012, 07:35:37 PM
Cool!! I was on my way to engineering a set for my 86' till recently when I discovered the challenge of welding them up. I am hoping to find some Rentec's up for sale soon..... Soon.... Soon....   :unknown:
Title: Re: Lurked for a bit, thanks for the info...
Post by: Mark Olson on October 22, 2012, 03:02:58 PM
you can tell if it is tuned right if the oil level light comes on in 2nd gear at wot.

5 turns is way up there on the idle mix.  most of us are in the 3 1/2 turns range.
Title: Re: Lurked for a bit, thanks for the info...
Post by: fj11.5 on October 22, 2012, 04:04:45 PM
using 40# pilots , and 2.5 turns out on 84 effie <<<< had 42,s but too rich even with needles screwed in under 2 turns
Title: Re: Lurked for a bit, thanks for the info...
Post by: Theremikegoes on October 22, 2012, 05:49:22 PM
Can the blip test lie?  The screws have effect on the motor and it idles glassy smooth so I'm pretty sure its just asking politely for more fuel.  I checked for intake leaks with starter fluid(fire extinguisher handy) and looked for exhaust leaks.  3 turns out on the mixtures required very slow throttle to keep it from not only bogging, but dieing.  I stopped at 5 because I was concerned about the screws not having enough tension to maintain their adjustment, but it was still getting better from 4-5.  Right now there's only slight hesitation if you really grab a fast fistfull-dont think i could do it on the bike. I like to bracket the adjustment though, and I cant adjust far enough to hang on the blip so I'm hoping 42.5's will bring the adjustment in range.

oil light aye, I like it.  I wasnt WFO in second, more like 3/4.  I felt the front start lighten like it was about to lift and was happy enough, I'll have to sit on the tank a bit more and try it again.  It rather suprised me, I wasnt expecting to it to lift that easy-I expect it of my sub 300# street xr600r, but wasnt ready for the fj to do it, haha. Seeing as its raining the next few days I wont be giving it that much twist for a while though- I pretty much pretend the world is an oil slick when I ride in rain.

Here's my previous project, non fj, but still a big piston'd aircooled import...
(http://i3.photobucket.com/albums/y83/cmikeblank/DSCF1496.jpg)
Title: Re: Lurked for a bit, thanks for the info...
Post by: andyb on October 22, 2012, 05:59:34 PM
Almost sounds like the float height is vastly off, but I'd probably do the same that you're doing.
Title: Re: Lurked for a bit, thanks for the info...
Post by: Theremikegoes on October 22, 2012, 06:53:56 PM
I did forget to check float height when I changed jets... hmm.  so on that line of thinking if there's a 'problem' it would be low fuel level/ float level too high?  I would expect it to also starve at higher rpm, which it doesnt appear to.  worth a check though, and I'm kicking myself for not checking float height. 
Title: Re: Lurked for a bit, thanks for the info...
Post by: Theremikegoes on October 22, 2012, 07:08:48 PM
well, rightmost carb has a fuel level of dang near 3mm- did the clear line test method.  didnt check the others but if they were drastically different it would run like dog doo.  I'll verify float heights when I swap in the 42.5's... unless someone can come up with anything else that could be goobered...?