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flaneledholes
10-06-2002, 03:10 PM
When I rev the ol' 400 it makes a whirling sound, is this normal??? I have the air-box lid, could it be in there??? I know I need the valves adjusted, because it is makeing a ticking sound, but could it also make the whirling sound???

Thanx:)
Chef
10-06-2002, 03:14 PM
you can just hear it suck air without the air box lid, dont worry about it, mine does it alot.
bmw500hp
10-06-2002, 03:28 PM
Yep,,, mine does too.... so does my buddies... if ya find out what it is, please let me know..

Mike
Joesflies@aol.com
Pappy
10-06-2002, 03:37 PM
it means its time to feed the squirrell!!!:eek: :blah :D


mine did it also....nuttin to worry about;)
flaneledholes
10-06-2002, 04:28 PM
Thanx you guys, I appreciate it... Maybe you can answer another question for me, a mechanic priced me $50 to adjust my valves... I thought it was a bit pricey, but is that a good deal or not... I know a guy who will charge me $20 to do it, but he isnt a proven mechanic that has his own shop either, he does it in his back-yard actually...

Thanx again
Matt
NJ300ex
10-06-2002, 04:57 PM
The whirling sound is the oil pump at work. Every 400ex I have ever seen makes the noise.
L.Vegas400
10-06-2002, 04:58 PM
if you have any mechanical skills, you can adjust them yourself. all the instructions you need are under ex tech at the top of the page. you'll save yourself $$, and have a little personal satitisfaction if you do it yourself.
eldoexrider01
10-06-2002, 05:10 PM
i dunno bout yall but i like that noise:D :D i could hear it better wit stock pipe. but it made me feel like it had a small turbo on it. my truck kinda does the same thing so i love that noise!!!!
400exdad
10-06-2002, 05:45 PM
Flaneled, take the $ you were gonna pay the mechanic and buy a maintenance manual. This won't be the last time you have to adjust the valves. I do everything myself and everytime I do something new, I buy a new tool. Now I got a garage full of tools! :D
10-06-2002, 05:50 PM
dude. put a big o'l turbo it that succa then it will sound like a 747 at takeoff!!! :D :eek: :cool: ;)
eldoexrider01
10-06-2002, 08:37 PM
speakin of turbos i rode a raptor wit a hks turbo bored to a 770 and i was speachless when i rode it.:eek: the starter clutch bearing sounded like **** when u killed it. but this thing had like 18 grand in the thing including the quad. it almost had too much power unless u were on a road or in the dunes. i never thought i would say somthin had too much power:(
Pro400EXC
10-06-2002, 08:55 PM
Originally posted by flaneledholes
When I rev the ol' 400 it makes a whirling sound, is this normal??? I have the air-box lid, could it be in there??? I know I need the valves adjusted, because it is makeing a ticking sound, but could it also make the whirling sound???

Thanx:)

Hey Bro,you didn't Know??its the sound of the Greddy t40 Turbo Spolling up inside the exhaust manifold...all 400ex's come with one.....:huh

anyways...I actually never heard that sound on my 400ex...so maybe the oil pump ain't worikin?i dunno,runs fine for me....