Trouble Idling When Cold

[TBay Sledhead]

Just curious did you check the shims for wear, i.e. mic them on the edge them the middle?

 

[musselman]

I didn't have a way to measure the center where the valve stem touches (it's only about 4mm dia) but I measured the overall thickness and they seemed to be pretty close to the number on them, really no wear. Based on my clearance measurements after I can confirm that there was basically no wear as I was relying on the shims to be the dimension they said they were and in the end it all worked out.

I will hopefully have the rest of the gaskets early next week so I can finish assembling then see how it runs.

 

[sideshowBob]

I have adjusted four stroke motorcycle bucket and shim valve trains a few times[CBX Honda 6 cylinder for one] and I have not personally seen any wear on the shims...it was primarily exhaust valves clearances getting too small that needed adjustments.

Great thread as always from musselman !

 

[musselman]

I should have the gaskets tonight, I noticed that there was a trace of sealant used with the valve cover gasket, should I use any sealant when putting on the new gasket? The manual does not call for any but it came with it from the factory.

 

[sideshowBob]

I typically don't use any sealant on the rubberized valve cover gaskets on motorcycle four strokes[unless they leak after assembly]. The valve cover gaskets on these four strokes are designed to be reused not unlike our chain case cover gaskets. I would just ensure the gasket has a very light smearing of grease or oil[I put some grease on my fingers and rub the gasket down] this helps prevent the gasket from sticking and stretching if you pull it apart again.

 

[musselman]

Got the sled back together enough to start it but was too late to fire it up. Going to try it tonight, hope it runs well.

 

[musselman]

Well it didn't blow up so that's a good thing. I noticed that the idle was a bit higher than it was before and I had to turn it down. So far it idles very stable and does not drop. I will have to wait for colder weather to see if the cold start low idle has been eliminated. I also need to sync the throttle bodies again since the valve adjustment will affect this.

I posted a video below, I don't think the valve train is too loud, my donuts were also leaking so that made it sound worse than it was I think.

 

[steveg_nh]

Sounds good to me! Well done.

 

[DGZRT]

Great Job

 

[sideshowBob]

Sounds Great!
That is no easy job you just completed.
Well done.

 

[JROCK]

Sounds great! Warm idle is bang on did you notice anything with you cold idle?

 

[musselman]

Thanks guys, when I first started it the idle rose to about 2200 rpm and stayed there. It slowly came down once the temp light went out but seemed to settle around 1800. I had to turn the idle back down almost a full turn to get it back to 1500. This was starting it in a +5°C garage so can't say much about the "cold" start yet.

I will report back when I get some time on it, I would like to see if the fuel mileage changes as well since it was not great before.

 

[renegademan17]

Noticed your odometer @ almost 25K! Is that in miles or kilometers

 

[steveg_nh]

Noticed your odometer @ almost 25K! Is that in miles or kilometers

Looks like km.

 

[renegademan17]

Musselman, did you bother to replace the cam position sensor, or pressure sensor when all apart? I would like to narrow down the easier fixes 1st since my sled is doing the same as yours. I plan on replacing the TPS since it was known to be bad.