Go Back   ChinaRiders Forums > Technical/Performance > Dual Sport/Enduro
Register FAQ Community Calendar Today's Posts Search
Reply
 
Thread Tools Search this Thread Display Modes
Old 06-10-2019, 05:08 PM   #1
a1a5115   a1a5115 is offline
 
Join Date: Jan 2008
Location: Northwest Florida
Posts: 39
Hawk 250 burning oil, Cone Air filter

Hi,
Just before Christmas my son and I got a new Hawk 250 from RPS in Texas. He is the main rider and has enjoyed upgrading the bike. It has about a 1000 miles on it and starting seriously burning oil. He had put one of those "cone" air filters on it and had been doing quite a bit off road riding lately with his friends.
I pulled the top off the engine and the piston and rings were badly worn. I thought I would have trouble finding parts but I "googled" CG250 piston and was amazed at how available they were. From a ebay seller we got a new piston, rings, wrist pin and retainers for 15 bucks, FREE shipping.! I was also able to find the Honda service manual for the CG engine.
I honed out the cylinder and when we got the new piston it was identical to the old one. Put it all back together last night, runs great and no oil smoke.
I think if you are going to use your bike off road or in dusty conditions you might want to stick with a paper filter.
Hope this helps someone,
Paul


 
Reply With Quote
Old 06-10-2019, 06:39 PM   #2
ChipToothy   ChipToothy is offline
 
Join Date: Apr 2018
Posts: 819
By chance had the filter been properly oiled? I’ve ran mine through knee deep water along with dirt roading 50-100 miles a week and no gunk in the carb since I bought the bike 14 months ago.

It’s good the repairs were so cheap!!
__________________
Bashan Storm: Ebay steel exhaust wrapped, folding shift lever, seat mod, vm26 carb, air pod, dual led scrambler headlamps, windshield mod, led brake/tail light, secondary led brake light (swingarm), Ebay 295mm rear shock, back up CDI (racing unknown), oil cooler, digital gauge cluster,


 
Reply With Quote
Old 06-10-2019, 07:28 PM   #3
a1a5115   a1a5115 is offline
 
Join Date: Jan 2008
Location: Northwest Florida
Posts: 39
I'm not sure how it was oiled, but you can hold it up to the light and see plenty of spaces.


 
Reply With Quote
Old 06-10-2019, 07:34 PM   #4
Megadan   Megadan is offline
 
Megadan's Avatar
 
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,110
Dual element foam filter with the inner foam oiled is much better if you will encounter dirt/dust. Gone several thousand miles on and off road and not one spec of dirt in my carb.
__________________
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


 
Reply With Quote
Old 06-10-2019, 08:05 PM   #5
dpl096   dpl096 is offline
 
dpl096's Avatar
 
Join Date: Sep 2015
Location: East Central Hellinois
Posts: 1,344
Quote:
Originally Posted by a1a5115 View Post
Hi,
Just before Christmas my son and I got a new Hawk 250 from RPS in Texas. He is the main rider and has enjoyed upgrading the bike. It has about a 1000 miles on it and starting seriously burning oil. He had put one of those "cone" air filters on it and had been doing quite a bit off road riding lately with his friends.
I pulled the top off the engine and the piston and rings were badly worn. I thought I would have trouble finding parts but I "googled" CG250 piston and was amazed at how available they were. From a ebay seller we got a new piston, rings, wrist pin and retainers for 15 bucks, FREE shipping.! I was also able to find the Honda service manual for the CG engine.
I honed out the cylinder and when we got the new piston it was identical to the old one. Put it all back together last night, runs great and no oil smoke.
I think if you are going to use your bike off road or in dusty conditions you might want to stick with a paper filter.
Hope this helps someone,
Paul
Plain and simple... You won't rebuild the top end of a jap bike with new parts mind you.... For 15 bucks. I'm glad it worked out for you
__________________
************************************************** ***

" Time you enjoy wasting, is not wasted." - John Lennon

“I predict future happiness for Americans, if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.”
― Thomas Jefferson

"If you don't know where you're going any road will take you there" ....George Harrison song



Last edited by dpl096; 06-11-2019 at 08:48 PM.
 
Reply With Quote
Old 06-11-2019, 10:20 AM   #6
2LZ   2LZ is offline
 
2LZ's Avatar
 
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
Agree with MD. The K&N-type filters I use for street and light trail applications. Anytime I had a dedicated dirt bike, I got an Uni or Uni-type filter and oiled it. They work great for heavy dust.
__________________
"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life."

2007 Suzuki DRZ400S (SM convert)
2009 Q Link XP 200
1967 BSA B25 250cc Starfire
2022 Royal Enfield Interceptor 650
2023 Royal Enfield Scram 411
1948 Royal Enfield Model G 350


 
Reply With Quote
Old 06-11-2019, 10:41 AM   #7
JerryHawk250   JerryHawk250 is offline
Moderator
 
JerryHawk250's Avatar
 
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,713
Same here as MD and 2LZ. Properly oil filter will keep the dust out. My bike is quickly approaching the 6000 mile mark. I stuck my bore scope in over the weekend just to check things out. I still see cross hatch on the cylinder walls. Still has good compression as in no loss of. I have been running synthetic ever since my initial break-in. Approx. 800 miles.
Glad to see you got her fixed up. Gotta love these low cost bikes. Try fixing a Jap bike for that cost. lol
__________________
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


 
Reply With Quote
Old 06-11-2019, 01:30 PM   #8
Sport Rider   Sport Rider is offline
 
Sport Rider's Avatar
 
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,116
excellent that it was cheap to repair!


 
Reply With Quote
Old 06-11-2019, 06:55 PM   #9
Wild Dog   Wild Dog is offline
 
Join Date: Dec 2016
Location: Argentina
Posts: 756
Foam is the way to go, there are some foam filters that fit the stock airbox. Oil them from time to time and we are good to go.


 
Reply With Quote
Old 06-11-2019, 08:07 PM   #10
Pathfinders   Pathfinders is offline
 
Join Date: Nov 2017
Location: Upstate SC
Posts: 129
Congrats on the cheap fix.

Roy


 
Reply With Quote
Old 06-12-2019, 11:26 AM   #11
Weldangrind   Weldangrind is offline
 
Weldangrind's Avatar
 
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
This is the one I like, but you might need a straight neck: https://www.ebay.com/itm/BLACK-42mm-...MAAOSwFV9X0l39
__________________
Weldangrind

"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer


 
Reply With Quote
Reply

Tags
cg250, cone air filter, hawk 250 burning oil



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:36 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.