Venom X22R 250 performance mods

**JerryHawk250** · 05-08-2020, 10:59 PM

I got all my parts in and getting ready to start the disassembling of the bike in the morning. I was going to start tonight but got some bad weather coming through right now. I'll video and document the whole process including the porting of the head. Hopefully I won't have to remove the engine which will make it much quicker. Here's a few picture of the surgery table. Lol

Chrisguga · 05-08-2020, 11:05 PM

Awesome Jerry! I can’t wait to see your processes and learn from them so I can do my own build in the future!

**JerryHawk250** · 05-08-2020, 11:12 PM

I wanted to get started tonight but the sky fell out and wind is blowing . I wasn't getting stranded in my shed for the night. Lol. At least the weather is going to be nice and cool tomorrow.

Chrisguga · 05-08-2020, 11:17 PM

Heck yeah. I like that paper shop manual too. That’s nice to have on hand.

My only purchase tonight was the matching set of Chase Harper saddle bags. I needed just a little more cargo capacity than just the other two bags.

**JerryHawk250** · 05-08-2020, 11:20 PM

I printed the manual out today. Lol I'm ready for sure.

be sure to post pics of the saddle bags.

Megadan · 05-09-2020, 12:46 AM

You let a storm stop you? This was your perfect chance to do a Frankenstein film parody.

**JerryHawk250** · 05-09-2020, 07:17 AM

Quote:

Originally Posted by Megadan

You let a storm stop you? This was your perfect chance to do a Frankenstein film parody.

It would of been perfect with the lightening popping everywhere. It got pretty rough out there for a while. The neighbors old shed got knocked down to a pile of tin. Save him the trouble of having the tear it down himself. Lol

culcune · 05-09-2020, 12:51 PM

Jerryhawkenstein…(cue Beethoven music and lightning)

Quote:

Originally Posted by Megadan

You let a storm stop you? This was your perfect chance to do a Frankenstein film parody.

Biker_Andy · 05-09-2020, 07:08 PM

Nice, new pistons and cam, are they thinner gaskets too? I understand cam's and potentially increase compression with thin gaskets but how does a different piston make gains? Is it just in the combustion geometry? I'm a noob when it comes to engines.

Megadan · 05-09-2020, 07:21 PM

Quote:

Originally Posted by Biker_Andy

Nice, new pistons and cam, are they thinner gaskets too? I understand cam's and potentially increase compression with thin gaskets but how does a different piston make gains? Is it just in the combustion geometry? I'm a noob when it comes to engines.

High compression forged piston. 11:1 compression and a lighter and stronger piston.

wheelbender6 · 05-09-2020, 07:34 PM

Do you have a template for the porting or do you plan to just raise them a bit?

Biker_Andy · 05-09-2020, 07:36 PM

Oh so the piston is longer to further increase compression and recessed to prevent hitting all while made of lighter material? The compression rating on a piston is what it would alter the compression too from stock? I always thought it was compression rating the piston will reliably survive.

wheelbender6 · 05-09-2020, 07:39 PM

If you had completed the hop up during a terrible storm, when it started, your engine could have sang:

"I was born in a cross-fire hurricane
And I howled at the morning driving rain
But it's all right now, in fact, it's a gas"

**JerryHawk250** · 05-09-2020, 07:57 PM

Well I got her done. I did take pictures and video but won't be tonight. I have other things I need to take care of but will get then up as soon as I can. I couldn't remove the head and cylinder with the engine bolted to the frame. I unbolted the engine from the frame and let it sit on the bottom of the frame. I was able to tilt the engine to the side a little and removed the head and cylinder. I wasn't to bad. Better than unhooking all the wires and whatever else and removing the engine. The head was about like my hawk head. Exhaust side was restrictive and intake needed a good bit removed right where the intake bolted. Probably 27- 28 mm hole. I did some port matching on the intake side. Now it's a full 30mm. I used a full thickness stock head gasket so my compression ratio is about 10.5:1. I'll probably do a thin head gasket once the engine is broke in and rings are seated.
I got her all back together and she fired right up. Definitely has a thump to it now. I took it out for a short ride to break in the cam and seat the rings. No WOT runs but you can feel more power on the low end and a good bit more on the mid and upper rpm's.
I did have to go from a 110 main jet to a 120 and will probably have to go to a 125. I didn't get to install my AF gauge so once I install it I'll fine tune it. I'm happy with the results so far. I'm sure it will feel even better once broke in.

Chrisguga · 05-09-2020, 09:04 PM

Wow. Finished it in a day. That’s awesome, Jerry!

You’re making me REALLY want to go ahead and pull the trigger on the rest of my mods.

05-08-2020, 11:05 PM	#2
Chrisguga Join Date: Feb 2020 Posts: 187	Awesome Jerry! I can’t wait to see your processes and learn from them so I can do my own build in the future! __________________ 2019 Venom X22R K&N pod air filter, removed cat, 105 main jet, 36 tooth rear sprocket, RK racing 428 chain, oil cooler, NGK plug, bar risers, aftermarket mirrors, Grab On grip covers, phone mount/charger, Pro Grip tank protector, Chase Harper tank, tail, and saddle bags.
	2

05-08-2020, 11:12 PM	#3
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,721	I wanted to get started tonight but the sky fell out and wind is blowing . I wasn't getting stranded in my shed for the night. Lol. At least the weather is going to be nice and cool tomorrow. __________________ 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
	0

05-08-2020, 11:17 PM	#4
Chrisguga Join Date: Feb 2020 Posts: 187	Heck yeah. I like that paper shop manual too. That’s nice to have on hand. My only purchase tonight was the matching set of Chase Harper saddle bags. I needed just a little more cargo capacity than just the other two bags. __________________ 2019 Venom X22R K&N pod air filter, removed cat, 105 main jet, 36 tooth rear sprocket, RK racing 428 chain, oil cooler, NGK plug, bar risers, aftermarket mirrors, Grab On grip covers, phone mount/charger, Pro Grip tank protector, Chase Harper tank, tail, and saddle bags.
	0

05-08-2020, 11:20 PM	#5
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,721	I printed the manual out today. Lol I'm ready for sure. be sure to post pics of the saddle bags. __________________ 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
	0

05-09-2020, 12:46 AM	#6
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,110	You let a storm stop you? This was your perfect chance to do a Frankenstein film parody. __________________ 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
	3

05-09-2020, 07:08 PM	#9
Biker_Andy Join Date: Oct 2016 Posts: 347	Nice, new pistons and cam, are they thinner gaskets too? I understand cam's and potentially increase compression with thin gaskets but how does a different piston make gains? Is it just in the combustion geometry? I'm a noob when it comes to engines. __________________ Electrician & Electronics Tech 2014 Honda CB500XA 2016 CSC TT250 1976 Honda CJ360T 2022 Honda Navi
	0

05-09-2020, 07:34 PM	#11
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	Do you have a template for the porting or do you plan to just raise them a bit? __________________ "Its not WHAT you ride; its THAT you ride"
	0

05-09-2020, 07:36 PM	#12
Biker_Andy Join Date: Oct 2016 Posts: 347	Oh so the piston is longer to further increase compression and recessed to prevent hitting all while made of lighter material? The compression rating on a piston is what it would alter the compression too from stock? I always thought it was compression rating the piston will reliably survive. __________________ Electrician & Electronics Tech 2014 Honda CB500XA 2016 CSC TT250 1976 Honda CJ360T 2022 Honda Navi
	0

05-09-2020, 07:39 PM	#13
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	If you had completed the hop up during a terrible storm, when it started, your engine could have sang: "I was born in a cross-fire hurricane And I howled at the morning driving rain But it's all right now, in fact, it's a gas" __________________ "Its not WHAT you ride; its THAT you ride"
	1

05-09-2020, 07:57 PM	#14
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,721	Well I got her done. I did take pictures and video but won't be tonight. I have other things I need to take care of but will get then up as soon as I can. I couldn't remove the head and cylinder with the engine bolted to the frame. I unbolted the engine from the frame and let it sit on the bottom of the frame. I was able to tilt the engine to the side a little and removed the head and cylinder. I wasn't to bad. Better than unhooking all the wires and whatever else and removing the engine. The head was about like my hawk head. Exhaust side was restrictive and intake needed a good bit removed right where the intake bolted. Probably 27- 28 mm hole. I did some port matching on the intake side. Now it's a full 30mm. I used a full thickness stock head gasket so my compression ratio is about 10.5:1. I'll probably do a thin head gasket once the engine is broke in and rings are seated. I got her all back together and she fired right up. Definitely has a thump to it now. I took it out for a short ride to break in the cam and seat the rings. No WOT runs but you can feel more power on the low end and a good bit more on the mid and upper rpm's. I did have to go from a 110 main jet to a 120 and will probably have to go to a 125. I didn't get to install my AF gauge so once I install it I'll fine tune it. I'm happy with the results so far. I'm sure it will feel even better once broke in. __________________ 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
	4

05-09-2020, 09:04 PM	#15
Chrisguga Join Date: Feb 2020 Posts: 187	Wow. Finished it in a day. That’s awesome, Jerry! You’re making me REALLY want to go ahead and pull the trigger on the rest of my mods. __________________ 2019 Venom X22R K&N pod air filter, removed cat, 105 main jet, 36 tooth rear sprocket, RK racing 428 chain, oil cooler, NGK plug, bar risers, aftermarket mirrors, Grab On grip covers, phone mount/charger, Pro Grip tank protector, Chase Harper tank, tail, and saddle bags.
	1