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#511 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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Southern Hemisphere Hot Humid Summer is over
Things are cooling off weather wise here in Oz.
I went for a Sunday blurt on my local loop to clear the headspace as we do.. With the cooler autumnal weather taking effect going into winter the bike was loving the cooler, denser, crisp air... However checking the plug read it appear the WOT lean condition is back again. on the 45p/132m mid clip current setting. I will try a 136m and move the clip to 1st (leanest) position to see how it behaves... then play with the clip position for a bit. I have ordered a "performance" CDI with DPI switch settings to test. Though perhaps the dished Boao piston does not like the 4* adv timing key...? I have also order a new valve and spring set and a Dynop 70mm flat top piston for future proofing and backup. But right now I do not want to remove the head while the bike is running ok for the most part. |
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#512 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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I think on average my mpg is about 57mpg US
The big bore might have dropped it a bit but overall the slight pulling power makes up for it. Yes I have been running mostly lean condition and have not been shy of giving it the beans so I would be safe to say that 56-60 MPG is the average with soft panniers sticking out either side and about 90kg body weight. I think the cheap X ring chain is robbing some power at the top as 65mph/ 100kmph is not that common to get. So average speed is 55mph. But its getting the job done and TBH I'm not sure if i want to go any faster on the XL185 running technology... |
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#513 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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Ok I think I have discovered the Nibbi 28 and my 70mm dished piston BOAO big bore kit conflict limit issue that has been fish biting me above 7000rpm WOT.
The issue was a lean condition but it was not a result of main jet. The problem appears to be a fuel delivery cap due to the needle. There seems to be fuel limit above a 135main jet and needle positions 1,2 and 3/mid clip. I have gone to a 136 main and 4th needle clip position and the fish bite seems to have disappeared with more favorable spark plug reads in the nutty brown zone. So I now have adjustability again and can actually dial in optimum fuel delivery... Most users of the Nibbi 28 are not going passed 130 main on stock CG250 engine dynamics which is why the issue did not seem to present itself with other users. Just thought I'd share my recent discovery. |
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#514 |
Join Date: Aug 2022
Location: Lincoln CA
Posts: 129
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Can you please explain what you mean by "fish biting"? I've seen you mention it several times but I still don't understand what it's supposed to mean. I'll readily admit that I haven't read every post in this thread, so my apologies if you've already explained it.
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-2024 CSC TT250, stage 3 motocult kit, Nibbi PE28FL with custom-made cable controlled choke, modified stock muffler (larger diameter tailpipe), custom oil cooler installation with relocated stock evaporative emissions canister, oversized stainless steel footpegs, IMS folding tip shifter, a few little blingy bolts and bits. More personal preference mods to come. |
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#515 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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Ok when a fish bites and your holding a rod and line there is tug/lurch sensation.
On the bike riding wide open on the flat, was hitting 7000rpm ish and the engine hesitate for a split second which was the lean spot I couldn't get over using bigger jets. you could call it a hesitation or stumble but it was so acute and repeatable under the same parameters that a fish bite was the best descriptive metaphor. I was trying to use bigger jets and leaner needle position to 'cure' it. But it is apparent now leaner jets and richer needle position was the issue all along. At least now I know the engine does not mind the 4th clip...but my jetting might need more adjustment now. |
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#516 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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perfect subtropical winter weather here in SE QLD Australia. Thought it'd be a good time to swap the chain back to standard DID from the china X'ring experiment. As i wanted to find out how much top end i was sacrificing thanks to o'ring friction loss...
Things were going well up until the point i discovered the recent cush hub bushings i replaced were utterly worn out to the point of not existing anymore... So as it stands my only current running vehicle is the crunchy parts van...Which is frankly unacceptable. I think Sunday will be timing the injection pump on the main van day... |
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#517 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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Cush hubs take 3
Replacing the cush hubs that replaced the polyeurathane cush hubs that replaced the original cush hubs...
Purchased a pack of 12, CG125 cush hub rubber bushings. Hopefully wont vaporize in about 2000km like the last set... |
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#518 |
Join Date: Aug 2020
Location: Australia
Posts: 1,378
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RIGG Gear Saddle bags.
Removed the faded ebay special soft saddle bags.
Installed the new waterproof Rigg Gear saddle bags. I'd almost say they are practically air tight at first... A definite upgrade. Can fit a decent amount of shopping. Just don't make the mistake of doing up all the straps and then realizing you put them on back to front like I did. |
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