Some sort of rattle? Any ideas

[fitz18]

Hi guys, Ive just got my motor after doing a full rebuild myself. I was a bit nervous about starting it but it started no problem. Any way I have been doing the heat cycles on it and just took it sown the road there. I was driving nice and easy and trying to hear for any abnormal noises. Anyway when the bike is just sitting and ideling I can hear like a rattle. like there is a loose nut in there. It seems to be coming from the bottom end. I dont know what it cud be. maybe the push rod and cluctch ball?? It sounds like its on the left side. JUst wanted to check on here what yous thought cos I cant afford another rebuild if ive done something wrong.

 

I have dmc alien pipes, 240mains, mild ported cylinders from firehead on here, wiseco pistons standard bore.

 

 

Any help? TIA guys

[91banshee]

Hi guys, Ive just got my motor after doing a full rebuild myself. I was a bit nervous about starting it but it started no problem. Any way I have been doing the heat cycles on it and just took it sown the road there. I was driving nice and easy and trying to hear for any abnormal noises. Anyway when the bike is just sitting and ideling I can hear like a rattle. like there is a loose nut in there. It seems to be coming from the bottom end. I dont know what it cud be. maybe the push rod and cluctch ball?? It sounds like its on the left side. JUst wanted to check on here what yous thought cos I cant afford another rebuild if ive done something wrong.

 

I have dmc alien pipes, 240mains, mild ported cylinders from firehead on here, wiseco pistons standard bore.

Any help? TIA guys

if you think its coming from the left side you can pull the stator cover off and check everything in there , did you tighten the flywheel ?

[slingshotmb]

if you think its coming from the left side you can pull the stator cover off and check everything in there , did you tighten the flywheel ?

 

I also have this sound im hoping its the aftermarket clutch rattling.

[fitz18]

if you think its coming from the left side you can pull the stator cover off and check everything in there , did you tighten the flywheel ?

 

Yeah I tightened it to the torque specs in clymers. Im gona pull the plugs to see what shape they are in. A local builder told me 240mains are fine but with the ported cylinders i would have been inclinded to go up. Also the rattle is only there at idle. Any other ideas folks? Thanks for the replys!

[91banshee]

Yeah I tightened it to the torque specs in clymers. Im gona pull the plugs to see what shape they are in. A local builder told me 240mains are fine but with the ported cylinders i would have been inclinded to go up. Also the rattle is only there at idle. Any other ideas folks? Thanks for the replys!

240 mains are really lean even with a lid on , how loud is it ? they are noisey to begin with .

[fitz18]

240 mains are really lean even with a lid on , how loud is it ? they are noisey to begin with .

 

Im just back in after checkin plugs and they are dark brown so I really dont think its lean. I adjusted the idle as well and now I can t hear the rattle at all. but before i did that it was quite loud. Im hoping its nothing to serious. Its been that long since ive been on a shee i forgot how they sounded :biggrin:

 

Is it possible to tell if a bike is lean when breaking it in by lloking at the plugs. obviously i cant do a plug chop as i have to drive the shee easy but would the plugs give me a good indication if she was lean? The lean condition is the only thing that concerns me.

[theshee]

What kind of clutch did you put back in it? did you check the cushions before you put it in? Also, loctite the flywheel nut on, they are have habbit of backing off and making a rattle, and obviousley other problems if your flywheel comes off.

[fitz18]

What kind of clutch did you put back in it? did you check the cushions before you put it in? Also, loctite the flywheel nut on, they are have habbit of backing off and making a rattle, and obviousley other problems if your flywheel comes off.

 

I just put the standard clucth back in and never thought of checking the cushions. Ive read they can cause a sattle is this true? I didnt loctite my nut on so I will prob do that now. Is it essential to do that?

[theshee]

I would check the cushions for dang sure, easy to check, and you never know it may be it.

 

I wound say its essential to loctite that nut on, but I have had a flywheel come off on me, I was with RIPPEN when his came loose, and my bros came of too. Pretty easy thing to do for a little peace of mind.

[fastrthnu]

I would check the cushions for dang sure, easy to check, and you never know it may be it.

 

I wound say its essential to loctite that nut on, but I have had a flywheel come off on me, I was with RIPPEN when his came loose, and my bros came of too. Pretty easy thing to do for a little peace of mind.

 

sometimes my exaust springs rattle on the pipes :shrug:

[Stellar Performance]

I know this is gonna sound crazy....but start it up and hold the kick starter with your hand. Banshee's are know for the kick starters rattling. If you are gettting a fair amount of vibration due to not properly syncronized carbs, it will make it even worse. I see it all the time out in the dunes. If it is the kick starter....they sell rebuild kits....check ebay. The kit is simply a o-ring....a small spring....a small ball bearing...and a bolt. But it does make it nice and tight.

 

If that is not it....one thing I do when I get done reassembling a motor is to run it with the stator cover off. I break in most of my engines on the asphault, so dirt isn't a problem. But this way you can actually see that it is spinning true, and not coming loose. Of coarse...be careful not to put your foot into it

[Aussie Quad Racer]

after a rebuild many years ago i noticed a clicking noise at idle, i diagnoised it down to the reed valves snapping shut due to increased crankcase compession, this may be your noise