which would you do first and why?

bogieboy · 06-07-2021, 09:01 AM

so, got my bike (2007 roketa/shineray db07a, 200cc CG motor) back on the road, pretty well stock in the performance area, other than de-catted and an FMF powercore "silencer"...

i see a lot of people talking about the cams, the 4 degree advance keys, and PWK carbs... oh and head porting, not sure i am quite ready to do that yet though...

which one(s) do you all think would net the best gains on top end (holding speed on hills) or possibly increase the top end a bit?

bike is supermoto'd with 520 chain setup, 13/38 sprockets, the 38 is the smallest i can get short of custom made for a ninja wheel, and i doubt a 14 front will fit, the 13 is really tight as it is.

i am currently running the stock non limited cdi, but i have a blue "performance" cdi that i can try too...

**JerryHawk250** · 06-07-2021, 09:57 AM

Head porting and 4 degree timing key. The porting alone made a huge difference on my Hawk and X22R. I haven't installed the timing Key on my Hawk or my Ghost yet but did on the X22R. Performance improvement across the rpm Range.

China Rider 27 · 06-07-2021, 10:04 AM

I second the head porting and in my experience shifts the peak torque output higher up the rpm range providing more power at a higher rpm and thus better sustained speed on hills.

herbie · 06-07-2021, 02:42 PM

I think if you didn’t want to mess with removing the head just yet and you already have a better flowing exhaust then I would go for a good carb. I really like the PZ30b pumper carb

TxTaoRider · 06-07-2021, 02:49 PM

Put a cg250 engine in it. Lol

bogieboy · 06-12-2021, 02:10 PM

So, heres a fun snippet of fact... the cheapo blue aluminum body CDI actually does something... i have had one zip tied to the frame as a "just in case" solution should the stock cdi die on me... for giggles i plugged that one in today, and the same hils i was loosing speed on i am now holding pretty well steady.... so they do work... downside, theres a 50-50 shot it will try and backfire when cold starting...but it makes a difference for sure... also bike seemed to run a bit cooler as well, averaged 280°F where it used to ride right at 300°F or even a bit hotter on a hot day... temp was taken with a bolt on probe to the spark plug and wired to the Trailtech Vector Dash

JerseyTBR7 · 06-14-2021, 03:15 PM

Inexpensive Minkuni vm26 carb, jets, fuel/air extension screw, sprockets 33 rear 13 front/100 link 520 chain/ and tensioner, exhaust, better foot pegs, better shifter, rear shock, quality hand guards, off road tires if taking it off road.

All of the above is totals in the area of $400 to $500 with some budget shopping but you will have higher quality components and the bike serve you better and feel better.

After done with that list, you have upgraded it at minimal cost to the best it can be on a budget bike. Ride it and enjoy it.

06-07-2021, 09:01 AM	#1
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,045	which would you do first and why? so, got my bike (2007 roketa/shineray db07a, 200cc CG motor) back on the road, pretty well stock in the performance area, other than de-catted and an FMF powercore "silencer"... i see a lot of people talking about the cams, the 4 degree advance keys, and PWK carbs... oh and head porting, not sure i am quite ready to do that yet though... which one(s) do you all think would net the best gains on top end (holding speed on hills) or possibly increase the top end a bit? bike is supermoto'd with 520 chain setup, 13/38 sprockets, the 38 is the smallest i can get short of custom made for a ninja wheel, and i doubt a 14 front will fit, the 13 is really tight as it is. i am currently running the stock non limited cdi, but i have a blue "performance" cdi that i can try too...
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06-07-2021, 09:57 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,562	Head porting and 4 degree timing key. The porting alone made a huge difference on my Hawk and X22R. I haven't installed the timing Key on my Hawk or my Ghost yet but did on the X22R. Performance improvement across the rpm Range. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 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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06-07-2021, 02:42 PM	#4
herbie Join Date: May 2019 Location: Illinois Posts: 864	I think if you didn’t want to mess with removing the head just yet and you already have a better flowing exhaust then I would go for a good carb. I really like the PZ30b pumper carb __________________ 2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681
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06-07-2021, 02:49 PM	#5
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	Put a cg250 engine in it. Lol __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
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06-07-2021, 10:04 AM	#3
China Rider 27 Join Date: Dec 2018 Location: PNW Posts: 982	I second the head porting and in my experience shifts the peak torque output higher up the rpm range providing more power at a higher rpm and thus better sustained speed on hills.
	2

06-12-2021, 02:10 PM	#6
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,045	So, heres a fun snippet of fact... the cheapo blue aluminum body CDI actually does something... i have had one zip tied to the frame as a "just in case" solution should the stock cdi die on me... for giggles i plugged that one in today, and the same hils i was loosing speed on i am now holding pretty well steady.... so they do work... downside, theres a 50-50 shot it will try and backfire when cold starting...but it makes a difference for sure... also bike seemed to run a bit cooler as well, averaged 280°F where it used to ride right at 300°F or even a bit hotter on a hot day... temp was taken with a bolt on probe to the spark plug and wired to the Trailtech Vector Dash
	1

06-14-2021, 03:15 PM	#7
JerseyTBR7 Join Date: Oct 2020 Posts: 130	Inexpensive Minkuni vm26 carb, jets, fuel/air extension screw, sprockets 33 rear 13 front/100 link 520 chain/ and tensioner, exhaust, better foot pegs, better shifter, rear shock, quality hand guards, off road tires if taking it off road. All of the above is totals in the area of $400 to $500 with some budget shopping but you will have higher quality components and the bike serve you better and feel better. After done with that list, you have upgraded it at minimal cost to the best it can be on a budget bike. Ride it and enjoy it.
	0