F7 Problem HELP ! started by Applecyder92
	March 7th 2009 at 11:15 PM Post #1
	Applecyder92 Starting Member 21 Posts Group: Members Member Since: February 19th 2007 Location: International Falls, Minnesota, USA Current Sled: F7 NightFire
	Just got a 2004 F7 Nightfire Its EFI.... Ok Well I bought it and it was fast but i thought it was going to be faster Just bogs like crap at 70.... Is that normal for f7's ? Ok today here i am on hardpack with 94 studs hooked up no problem.... Then Cracked it down and DA DA DA .... it slows down Then speeds up.. Anybody know what this is? its like popping like it has no compression... Today it blew a hole in the pipe up close to the Y pipe... Was that the problem? Literally theres a hole !!! Maybe that hole was so small then when i cracked it down the air came out a slit? Then finally just Cracked open? Do you guys have any suggestions on what to do while i change the pipe? :P Thanks much ! Sorry for the long reading. Rating: 0 Quick Edit Edit Topic

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	March 8th 2009 at 10:46 AM Post #2
	2002ZR800 Arctic Cat "Ride the Pride!" 172 Posts Group: Members Member Since: December 3rd 2008 Location: Essex Jct, Vermont, USA Current Sled: 2002 ZR 800 2008-2009 Miles: 1288
	I would make sure your Exhaust valves are actuating. For there to be a hole I would think that cylinder must have gotten really hot and leaned out some how. 1988 El Tigre' 6000 1993 Prowler 2002 ZR 800 Cross Country Edition Rating: 0 Quick Edit Full Edit

	March 8th 2009 at 3:09 PM  [ Modified March 8th 2009 at 3:10 PM ] Post #3
	zxkid not really a kid anymore :( zxkid doesn't know what irritates him more..Home Depot, or their website! Updated Yesterday at 10:23 AM 491 Posts Group: Members Member Since: February 29th 2008 Location: N.Adams, MA, USA Current Sled: 2004 F7 SnoPro EFI 2008-2009 Miles: 1312
	My F7 flys into tripple digits on the dreamometer, so you should be pulling way past 70, sounds like either your clucth is messed or your powervalves are not working correctly. As for the hole in the pipe I heard alot of firecats crack in that spot. I believe the 1st Ypipes didn't have the bracket hanging off the clutch side cyl to support the pipe. "To be old and wise, you must first be young and stupid" Rating: 0 Quick Edit Full Edit

	March 8th 2009 at 4:16 PM Post #4
	MJay Sledaholic 6184 Posts Group: Members Member Since: March 16th 2004 Location: Goose Bay, Newfoundland, Canada Current Sled: 2006 Arctic Cat M7 2008-2009 Miles: 450
	x3 on checking/adjusting your valves. Rating: 0 Quick Edit Full Edit

	March 10th 2009 at 8:04 AM Post #5
	snownut1 New Member 56 Posts Group: Members Member Since: August 25th 2006 Location: Lake Luzerne, New York, USA
	times 4 on the power valves. Your coil could be failling also. I've heard of a lot of guys losing top end because of a bad coil. Valves first then coil! Rating: 0 Quick Edit Full Edit