09-02-2019, 09:08 PM | #16 | |
Join Date: Dec 2016
Location: Argentina
Posts: 756
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Quote:
This ↑↑↑ Same thing happens here, in the south of country hundreds and hundreds of miles without a soul or sometimes phone signal... In those area people just ditch small cc bikes for something more powerful or medium sized engines. |
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09-03-2019, 07:05 AM | #18 | |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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Quote:
After that I drilled the stock pilot to .45mm, added a 3rd washer to the needle and a 110 main jet (performs flawlessly up to 80° temps) and then it would do 66mph with the 12/33 (16/45 = 2.8) ratio. Now with the 13/33 (2.5) ratio it cruises along happily at 60mph and you can actually wind the first 3 gears some before having to shift up. Being that Florida is so flat you can probably get best results from 17/43 (2.5 ratio) or even go to 17/40 (2.35 ratio). |
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09-03-2019, 07:59 AM | #19 |
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Oddballs??? Fanatics??? Wait! I resemble that remark! lol
My Hawk in stock form with tuned stock PZ30 carb (40 pilot/115 main), gutted cat and 17/40 sprockets would top out at 72mph. But only after I had put 500-600 mile on it. before that it struggled to do 60mph.
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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09-03-2019, 08:04 AM | #20 |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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The gear ratio results
The Hawk class gear ratio average is 2.83
The TBR7/Magician class gear ratio average is 2.68 I think everyone will agree that the 2.5 ratio is the sweet spot for for these bikes as far as comfort and speed. This also tells me that the average Hawk class owner in the group is geared too low, which skews the top speed number a bit. And being that the TBR7/Magician class owners are closer to the sweet spot could also somewhat account for their higher top speed average. And as MegaDan mentioned the sweet spot for the TBR7/Magician class is probably lower (2.3 - 2.4) because of the smaller tire diameter. So basically the entire group is geared too low for accurate top speed numbers. Back to the drawing board I guess. |
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09-03-2019, 08:17 AM | #21 | |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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Oddballs and fanatics.. You and Dan are at the forefront of our sport and always pushing the envelope, which I have to applaud and the rest of us appreciate. There was one owner in the study that did a mild port and polish without decking the head and his top speed was 71mph, but the average Hawk owner isn't gonna go that far. |
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09-03-2019, 08:20 AM | #22 | |
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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09-03-2019, 08:39 AM | #23 |
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One thing to understand is that P&P and decking the head doesn't really increase the top speed by a whole lot but it really wake up the mid to upper rpm range to where when running 60-70mph you don't have to twist the throttle wide open to do it. Finally got some nice weather here. I started Friday after work till yesterday riding. I put a few hundred miles over the Labor Day weekend cruising anywhere from 60 -70 mph and never thought twice about doing it. One of the best mods you can do on these bikes.
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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09-03-2019, 09:09 AM | #24 | |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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It's already a pain keeping a jug of 2-stroke mix around for the very thirsty Scrambler. |
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09-03-2019, 09:14 AM | #25 | |
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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09-03-2019, 01:22 PM | #26 | |
Join Date: Sep 2019
Posts: 9
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Quote:
i have 180 miles on it. so once i hit 500 it should perform better? i have done jets except the pilot jet. i dont where to get it. |
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09-03-2019, 01:46 PM | #27 |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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Yes it will definitely perform better at 500 miles and will keep improving all the way up to 1000. Drill the pilot to.45mm or order Tako's sprocket and jet kit.
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09-03-2019, 06:53 PM | #28 | |
Join Date: Dec 2015
Location: CO
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"Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P. |
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09-04-2019, 12:01 AM | #29 | |
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Location: Hell
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09-15-2019, 02:35 AM | #30 |
Join Date: Nov 2018
Location: Stockport, Oh.
Posts: 1,442
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Well after much debate, a few fistfights, and some heartfelt apologies at the last Bored Member meeting it has been decided that a 2.5 gear ratio is NOT infact the "sweet spot" for these little China bikes.
A broad consensus of our riders who weigh 175+lbs and don't live in the flatlands feel that a 2.6 ratio is more to our liking and J. Money concurs (not sure why but Jay's hoping that moniker will stick). Even at his meager 140lbs he says the 2.3 ratio felt like power assisted coasting and is really pleased with his current 2.6 ratio. Justin, another member of the study has been playing with different ratios before upgrading to the 520 setup. He tried the 2.5 per my recommendation (he's currently 2.86) and there was no speed increase and a significant power loss in 4th and 5th, so he wants to go to a 2.75 which I strongly disagree with because that was my last ratio and it was a pinch too low. I currently am at 2.53 with 13/33 sprockets (which J. Money loves), but if I'm not happy with it I'm gonna go to 13/34 which is a 2.61 ratio. **Also if you go to the 520 do not go bigger than a 12 tooth front sprocket. I had to cut out a significant portion of the sprocket cover to make clearance for the beefier chain. |
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