1999 CR250, cylinder base gasket cutting?

Joined
Jul 20, 2002
Messages
22
Likes
0
#1
I just did the top and bottom end on my 99 cr 250 and now about an hour after putting the whole bike together and filling it with fluids, my dad who helped out tells me he thinks there was a piece of the cylinder base gasket that covered a port or hole of sort in the cases that he thought was supposed to be cut out.
Does anyone know if Honda sells these gaskets with some of the holes not already cut out?

Should I just leave it and go ahead and try to run it assuming that 1) if it covered the intake port the bike won't run anyway and then I can check it.

Or 2) if it covered a passageway for coolant the bike will boil over and I'll know there's a problem.
 
Joined
Apr 6, 2007
Messages
95
Likes
0
#2
if it is covering the coolant i would take it apart and check. the people that hadmy bike before silconed the water ports and it fried the motor. new piston rings and re cromed
 
Joined
Jul 20, 2002
Messages
22
Likes
0
#3
there's gotta be an easy way to check for fluid flow without having to pull the cylinder head again. I figured after that if the intake ports were blocked the bike wouldn't have any compression. If the water ports are blocked I should be able to check the fluid exit tube that goes back to the rad or something
 
Joined
Apr 8, 2007
Messages
292
Likes
0
#4
start the bike and squeeze the coolant hoses. you should feel a pulsating feeling.
 
Joined
Nov 17, 2005
Messages
55
Likes
0
#5
Trust me on this one, if there is any doubt that there may be a problem just check it. I just $570 to fix my top end because I was too lazy. Unless of course someone knows a way to check without taking it apart.
 
Joined
Jul 20, 2002
Messages
22
Likes
0
#6
I just listed how I plan on checking it without taking it apart. I'm just waiting for someone to post a reply agreeing with it or telling me why it wouldn't work.
 
Joined
Apr 26, 2007
Messages
147
Likes
0
#7
If only 1 or 2 of the coolant passages are blocked, then it's still going to have plently of flow and you won't be able to tell the difference. You may get localized heating due to the blocked passages. Uneven heat in the cylinder will cause distortion, and if it's severe enough, warp it. It's no big deal to slide the cyl. up enough to check and be sure. Since you just put it together, you won't have to worry about the gasket sticking and tearing. I agree with the others, take it back apart and double check. It's worth the little bit of work it takes just for the peace of mind.

Marc -
 
Joined
May 19, 2006
Messages
1,500
Likes
1
#8
Go to a dealer and look at a new gasket and a new cylinder or case and see if it covers a hole.
 
Joined
Jul 20, 2002
Messages
22
Likes
0
#9
well, considering I just tore the engine completely down, rebuilt the transmission, bottom end and top end, put the rest of the bike together and filled it all with fluids I'm a little hesitant to strip off all my plastic, the tank, the carburetor or subframe, drain my rad fluid, remove my cylinder bracing, exhaust pipe, and coil just to check something so unlikely, but I guess since I can't find anyone with the knowledge to help I'll go ahead and do it. I wish it was as little as just sliding the cylinder up.
 
Joined
Feb 29, 2000
Messages
46
Likes
0
#10
As I have my cylinder off being bored, I checked the bottom end. The gasket has 2 holes (round) at the front of the engine, roughly between the front cylinder studs. Everything else is covered except the exhaust valve linkage. I didn't pickup the new gaskets yet, but I'll let you know if they're the same.
 
Joined
Jul 20, 2002
Messages
22
Likes
0
#11
thanks alot man, the part he thought needed to be cut was at the carburetor side of the base, let me know how the new gasket is.