08-18-2021, 07:47 PM
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#61 | |
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Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 407
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Quote:
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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04-15-2023, 04:32 PM
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#62 |
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Join Date: Jan 2021
Location: Lehigh Valley Area
Posts: 149
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Any advice on where to get a pre-turned big bore kit?
Tried AliExpress, they processed my payment, but cancelled my order. Good news, paypal refunding money. Thx, |
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04-15-2023, 08:04 PM
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#63 |
Join Date: Aug 2020
Location: Australia
Posts: 1,298
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There are still a few CG300* kits on Aliexpress.
there is this 73mm skirt option but it comes with a 16mm pin, however they say "please contact for 18mm pin" Dynop official https://www.aliexpress.com/item/1005...70240.html?spm Cheaper store: https://www.aliexpress.com/item/1005...13236.html?spm I got 1 of the 16mm pin 76mm skirt options a while back before 73mm were being listed...prices were cheaper in AUD back then. Haven't got it machined down yet to fit....but I'm thinking about getting done soon. though if the machining quote is near $100aud i might just get another pre machined 73mm kit :/ Last edited by XLsior; 04-23-2023 at 10:48 PM. |
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04-23-2023, 10:53 PM
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#64 |
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Join Date: Aug 2020
Location: Australia
Posts: 1,298
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Just out of curiosity anyone have any idea how safe is it to deck the jug and if so by how much?
If I am going to get the skirt turned down to 73mm I might as well get the top face skimmed too... When i see these kits installed there seems to be about 3mm of TDC piston gap to the cylinder mating face. That seems somewhat excessive. But how much is a safe skim with all the other components taken in consideration... is 1mm to much? |
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04-24-2023, 08:55 PM
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#65 |
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Join Date: Aug 2020
Location: Australia
Posts: 1,298
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Ok I just watched the Motocult perfomance hawk kit YT video being installed.
From what I can see they deck the cylinder 2mm and provide shortened locating dowels and a rocker assembly spacer plate that looks about 2mm thick. Cant remember if the washers under the head stud torque nuts are stock... Going by this assessment I think 1mm should be safe. |
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04-27-2023, 10:36 AM
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#66 |
Join Date: Sep 2022
Location: Ohio Valley
Posts: 687
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2022 Hawk 250 |
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04-27-2023, 08:58 PM
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#68 |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,334
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That looks like a new pushrod cam too. Interesting kit. I wonder how much it bumps hp. And durability.
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-2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it |
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04-28-2023, 07:21 AM
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#69 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,030
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The Motocult parts are pricey, but they aren't unreasonable. The cams they sell are WGK, the same as the one I put in my bike. $75 is actually quite a fair price and only a few dollars more than what it cost me to get mine directly from Brazil.
The jugs are decked with a mill to set a tight squish gap and have the base machined to 73mm. $250 is reasonable considering the machine work. You can buy a cylinder on Aliexpress with the 73mm base already finished for about $160 delivered, but it does not have the deck milled down. $250 for the ported head is again, pretty reasonable. Also, the kits come with a rocker arm shim to correct the rocker angle if you get the cylinder. That's a nice detail. I wouldn't hesitate to buy the Motocult stuff if I didn't want to invest in a lot of time and tools to do all this work.
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Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
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