85 Magna V30 has no power under 3000 rpms

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Mon Mar 20, 2006 12:18 pm

I don't know what this is a symptom of so I throw it to you guys.

When getting the bike going, unless you have it above 3k rpms, she'll sputter and die on you. When riding and going through the gears there's no power under 3k but when you hit it the bike jumps forward with a second wind.

Any thoughts?

#2 Unread post by **Skier** » Mon Mar 20, 2006 3:29 pm

How are the pilot jets in the carbs? Partially clogged ones could cause this.

Mon Mar 20, 2006 4:44 pm

Carbs are clean as a whistle

#4 Unread post by **Skier** » Mon Mar 20, 2006 4:54 pm

So you've pulled the pilot jets, blown them clear of old fuel with compressed air and could clearly see the circular opening at the end, when held towards a light?

If those are CV carbs (I'm not certain), it sounds like needle clip position. Does the bike make lots of noise at full throttle but no or little power? Sounds like the needles need to be moved up, by lowering the position of the clip on the needle.

Is the bike stock? Have stock jets and whatnot in the carbs?

Mon Mar 20, 2006 5:02 pm

Skier wrote:So you've pulled the pilot jets, blown them clear of old fuel with compressed air and could clearly see the circular opening at the end, when held towards a light?

Yep

Skier wrote:Does the bike make lots of noise at full throttle but no or little power?

At full throttle she has both noise and power. She gets up to 100 fairly fast. When I first start moving I have to gun the engine a bit but once she's rolling and I get her above 3000 rpms she pulls hard.[/quote]

Skier wrote:If those are CV carbs (I'm not certain), it sounds like needle clip position. Sounds like the needles need to be moved up, by lowering the position of the clip on the needle.

I can try changing the needle, it's such a pain pulling those carbs but if it needs to be done, so be it.

Skier wrote:Is the bike stock? Have stock jets and whatnot in the carbs?

Yep

#6 Unread post by **Skier** » Mon Mar 20, 2006 5:08 pm

I'd be more inclined to look at other things besides the needles, espcially if it's under 3,000 RPMs. How about idle mixture screws? Are they set to factory sepcs (usually two to three turns out, check your manual)?

Ya also might want to give this a read, it can be helpful:

http://www.factorypro.com/tech/carbtun.html

Wed Mar 22, 2006 5:23 pm

Idle mixture screws are set to factory specs. This is killing me. Maybe magnas normally don't have power under 3k rpm?

Anyone have an idea? Maybe something to do wit hthe V-4 engine?