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Post by Lucass2T on Sept 28, 2015 8:02:05 GMT -5
Its the fine tuning that takes time. You will get there.  I know but it's going back and forth. Earlier (when i did the france roadtrip) it ran quite okay with a 98mj (maybe i had a slight air leak? but nothing pointed that direction though) and then the ignition was starting to have issues (cdi failed) which i found out after i swapped around some jets. Ans now im back to square one where i left when my previous engine failed, at mj92. Mj 92 still gives slight bogs when going to WOT after some low speed driving. So now im gonna put in a needle with a shorter taper which leans out the mixture somewhere from 1/4 to 2/4 throttle. I might even drop the it one clip compared to where it's now (middle position). Also gonna put in green malossi clutch springs. Right now i have the yellow ones bu they are too weak as you can hear in the speedrun video. |
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Post by spaz12 on Sept 28, 2015 14:38:01 GMT -5
Sounds like its running good now It's not running as it's supposed to be. The 94mj is just a tad to big. I still have slight bogs beyond 3/4 throttle so i'll have to back to 92 just as I had with the previous engine. Also im gonna put in a needle with a shorter taper because around 1/4 and 2/4 throttle the engine runs rich and is very sluggish. Yep, it's all about those needles once you get your main set for WOT. It can be so damn frustrating sometimes. |
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Post by iwiketuddlz on Sept 28, 2015 14:45:03 GMT -5
Mmm!  I'm having the same issue with needle jetting I believe.... Ima buy a few diff needles and see what's up... Good luck aeroxbud!!! Hope ya fixes it |
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Post by Lucass2T on Sept 28, 2015 14:50:35 GMT -5
Well, swapped to a needle with a shorter taper (but same tip thickness) and the clip in the 2nd leanest position. Bogging like hell @ WOT?? Don't know whats going on here?
Only Swapped to a needle thats only slightly different from the previous and the engine runs like shit now? Checked the plug, Light Grey...? Come on whats going on here?
Then Switched needle clip down (richer) two positions and still the same problems.
I know 94 is too rich, 92 too lean? No way that needle makes such a big difference in mixture...im a bit confused here. Next thing im gonna do is swap back to 94mj and See what happens there.
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Post by iwiketuddlz on Sept 28, 2015 15:38:30 GMT -5
Wow that's crazy a needle did that?? mmm?? I'm curios to the culprit good sir.??
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Post by spaz12 on Sept 28, 2015 17:52:10 GMT -5
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Post by Lucass2T on Sept 28, 2015 18:26:49 GMT -5
thanks spaz! im gonna study that part. |
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Post by aeroxbud on Sept 29, 2015 8:49:27 GMT -5
I remember when I brought my CB599, my wife said to me your not going to be buying loads of those jet things for this like you did the Aerox!
Bless em they just don't understand
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Post by iwiketuddlz on Sept 30, 2015 5:58:36 GMT -5
Thanks for this spaz!!!i have been reading for days now about the importance of the needle jet and tuning carbs lot of info to take in.!! But I love it!!! I now look at a needle intirely dif.!! |
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Post by Lucass2T on Sept 30, 2015 14:22:57 GMT -5
There's one thing about needles im still not yet entirly sure of...
How much does needle tip diameter affect mixture at WOT? And does clip position affect mixture at WOT? Im pretty sure it does but to what extent.
My thoughts would be like somewhere between 10 and 20 depending on clip position. A a low needle (lean) will probably affect mixture @ WOT more than a needle sitting high (rich).
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Post by spaz12 on Sept 30, 2015 14:23:19 GMT -5
Yeah, them needles are pretty important I just learned something last night about the Dellorto PH series cabs; that the needle is in the atomizer at all times. That the main jet never fully takes over. I did not know that. :/ |
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Post by spaz12 on Sept 30, 2015 14:25:45 GMT -5
There's one thing about needles im still not yet entirly sure of... How much does needle tip diameter affect mixture at WOT? And does clip position affect mixture at WOT? Im pretty sure it does but to what extent. My thoughts would be like somewhere between 10 and 20 depending on clip position. A a low needle (lean) will probably affect mixture @ WOT more than a needle sitting high (rich). I'm looking into that after what I found out about the Dellorto last night. I have to look later though because I have a doctors appointment here in a little while. |
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Post by Lucass2T on Sept 30, 2015 14:28:02 GMT -5
Yeah, them needles are pretty important I just learned something last night about the Dellorto PH series cabs; that the needle is in the atomizer at all times. That the main jet never fully takes over. I did not know that. :/ You mean the needle and main jet are always dependant of each other? Well i knew a needle never leaves the 'tube' it sits in...otherwise it could get stuck between the slide and the floor of the venturi preventing to close the slide  Then everytime you would go WOT at a straight you'd risk going WOT into a corner as well Referring back to my question... Does/can changing from a very pointy needle to a very blunt one have the same effect as changing a full jet size when keeping the same needle? Does it affect mixture that much? |
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Post by spaz12 on Sept 30, 2015 14:31:17 GMT -5
apparently it does on the Dellorto. I'm not sure about our pwk's . I'm studying....
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Post by Lucass2T on Sept 30, 2015 14:34:52 GMT -5
apparently it does on the Dellorto. I'm not sure about our pwk's . I'm studying.... i guess that goes for every 'needle/slide type' carb. See my edit in the post above |
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I'm having the same issue with needle jetting I believe.... Ima buy a few diff needles and see what's up...
Then everytime you would go WOT at a straight you'd risk going WOT into a corner as well