Go Back   ChinaRiders Forums > Technical/Performance > Street
Register FAQ Community Calendar Today's Posts Search
Reply
 
Thread Tools Search this Thread Display Modes
Old 11-13-2018, 11:45 AM   #1
Weldangrind   Weldangrind is offline
 
Weldangrind's Avatar
 
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
Barnone, I suspect you have a cat hidden in that muffler. If so, I bet there's more power hiding in there.
__________________
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
Old 11-13-2018, 11:51 AM   #2
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Yep. There is cat in the header pipe. Not going to mess with that now. Also doubt that it would make much difference in power.


 
Reply With Quote
Old 11-13-2018, 12:11 PM   #3
JerryHawk250   JerryHawk250 is offline
Moderator
 
JerryHawk250's Avatar
 
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,713
Quote:
Originally Posted by Barnone View Post
Yep. There is cat in the header pipe. Not going to mess with that now. Also doubt that it would make much difference in power.
From my experience on the hawk it makes a big difference. I would do it after you have it 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


 
Reply With Quote
Old 11-13-2018, 02:17 PM   #4
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Removed the cat on many bikes in the past with little or no difference in performance. Just more noise so I will leave it be.


 
Reply With Quote
Old 11-13-2018, 03:40 PM   #5
JerryHawk250   JerryHawk250 is offline
Moderator
 
JerryHawk250's Avatar
 
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,713
Quote:
Originally Posted by Barnone View Post
Removed the cat on many bikes in the past with little or no difference in performance. Just more noise so I will leave it be.
I guess it's different from bike to bike. Hawk cat was pretty restrictive. It was like pulling a cork. Just removing the cat I had to up the main jets from a 110 to a 115 and the 110 was a little on the fat side with the cat. Porting the head opened it up even more. From looking at the picture I really don't see a cat in the header unless it is in the muffler itself.
__________________
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 11-14-2018, 09:19 AM   #6
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
The owner's manual has a photo that shows that cat in in the header pipe close to where the muffler is so I will leave it be. The engine has a decent sound that I am surprised passed ETA.

The engine is a 165fmm Honda OHC CB250 clone at 223 cc.

The valve adjust adjustment clearances on the metal tag on the frame show a value of .02-.04 mm for both valves.
Does that seem right?


 
Reply With Quote
Old 11-14-2018, 10:25 AM   #7
JerryHawk250   JerryHawk250 is offline
Moderator
 
JerryHawk250's Avatar
 
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,713
Quote:
Originally Posted by Barnone View Post
The owner's manual has a photo that shows that cat in in the header pipe close to where the muffler is so I will leave it be. The engine has a decent sound that I am surprised passed ETA.

The engine is a 165fmm Honda OHC CB250 clone at 223 cc.

The valve adjust adjustment clearances on the metal tag on the frame show a value of .02-.04 mm for both valves.
Does that seem right?
I'm sure the CB250 has a less restrictive head and exhaust than the Hawk. .02-.04 mm sounds about right for the CB250.
__________________
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 11-15-2018, 07:51 AM   #8
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Quote:
Originally Posted by JerryHawk250 View Post
I'm sure the CB250 has a less restrictive head and exhaust than the Hawk. .02-.04 mm sounds about right for the CB250.
Do I need an angled feeler gauge to check the valve clearance on the CB250 OHV clone engine? I have straight feeler gauges that I guess could be bent?


 
Reply With Quote
Old 11-15-2018, 07:58 AM   #9
JerryHawk250   JerryHawk250 is offline
Moderator
 
JerryHawk250's Avatar
 
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,713
Quote:
Originally Posted by Barnone View Post
Do I need an angled feeler gauge to check the valve clearance on the CB250 OHV clone engine? I have straight feeler gauges that I guess could be bent?
From looking at your pictures it looks like you could use a straight feeler gauge on the exhaust. Doesn't look like you have much room on the intake side. You may have to use an angled feeler gauge on the intake.
__________________
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 11-14-2018, 11:36 AM   #10
MDStroup   MDStroup is offline
 
MDStroup's Avatar
 
Join Date: Apr 2016
Location: Chesapeake, VA
Posts: 207
Oooh! Another CB option. That is great to know. I wonder what kind of speed you can get from her.


 
Reply With Quote
Old 11-15-2018, 07:52 AM   #11
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Quote:
Originally Posted by MDStroup View Post
Oooh! Another CB option. That is great to know. I wonder what kind of speed you can get from her.
Me too! I won't know for several weeks since I am in the break in period.


 
Reply With Quote
Old 11-16-2018, 06:31 PM   #12
MustangMiddle24   MustangMiddle24 is offline
 
Join Date: Nov 2018
Posts: 4
Quote:
Originally Posted by Barnone View Post
Me too! I won't know for several weeks since I am in the break in period.

What speed are you getting in the break in period and does it struggle to get there? Also are you loctiting everything?


 
Reply With Quote
Old 11-16-2018, 07:23 PM   #13
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Quote:
Originally Posted by MustangMiddle24 View Post
What speed are you getting in the break in period and does it struggle to get there? Also are you loctiting everything?
Owned 50 or more bikes ( British bikes, Japanese bike, Chinese bikes, Russian bikes) over the last 60+ years and never loctited any of them and never had a problem with parts falling off. Seems to have good power but I am not pushing her yet. Also need to check the speedometer accuracy.


 
Reply With Quote
Old 11-16-2018, 07:29 PM   #14
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
Just got the Certificate of Origin and the sales receipt from the seller so will register her next week. Then I can put some kilometers on her.


 
Reply With Quote
Old 11-16-2018, 10:42 PM   #15
Barnone   Barnone is offline
 
Barnone's Avatar
 
Join Date: Feb 2007
Posts: 1,357
We shall see when I need to do the first valve check/adjustment. Be a while.


 
Reply With Quote
Reply



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 07:48 PM.


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