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My '21 S2S rattles quite badly for a few seconds after ~5 months layup start - any way to spin the motor without starting?

F

Flier Tuck

Member
I normally lay Borys (2021 S2S) up over the winter, 5 months. The last two times on start up the motor rattles quite badly for a few seconds. I assume that this is the hydraulic lifters filling up. Is there any way to spin the motor without it starting, such as removing a fuse to isolate the injectors?
 
Do you change your oil before you lay it up for winter? And what weight oil do you use?
 
Amsoil claims that their product stays on parts much longer than most other oils. We have found this to be true. Not saying it would cure your problem. But it would be interesting to try it and see.

Mikey has a good question. If you are using the BRP blended oil. It shears down to 20w at about 5,000 miles. That's 1/2 the viscosity lost from the original 40w. Without getting into startup viscosities, etc., it may be no wonder that you're getting some noise if the oil has degraded this much and left sit for an extended period of time.

It is well known that the lion's share of wear occurs at startup.
 
Flier Tuck said:
I normally lay Borys (2021 S2S) up over the winter, 5 months. The last two times on start up the motor rattles quite badly for a few seconds. I assume that this is the hydraulic lifters filling up. Is there any way to spin the motor without it starting, such as removing a fuse to isolate the injectors?
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Not sure about your STS but if you leave the kill switch in the kill position it should still crank the motor over, but it will not start.
 
The oil was changed before putting Borys away for the winter and taken for a short ride. The oil is Castrol fully synthetic of the correct viscosity. This is the oil and procedure I have used for the 9 years I have owned Spyders, but only had this problem for the last two.
 
Flier Tuck said:
The oil was changed before putting Borys away for the winter and taken for a short ride. The oil is Castrol fully synthetic of the correct viscosity. This is the oil and procedure I have used for the 9 years I have owned Spyders, but only had this problem for the last two.
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Well then, my first reply would not apply. It may well be your cam chain tensioner. It is always good not to rev an engine at startup. Letting it idle for 30 seconds or so allows oil to reach all locations before stressing the engine.

(Fixed) The 998 V-Twin Spyder does not have hydraulic lifters. The 1330 does. My bad!
 
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BajaRon said:
Well then, my first reply would not apply. It may well be your cam chain tensioner. It is always good not to rev an engine at startup. Letting it idle for 30 seconds or so allows oil to reach all locations before stressing the engine.

The Spyder does not have hydraulic lifters.
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Actually, the 1330 DOES have hydraulic valve lash adjusters. Not lifters, technically, but they serve the same purpose.

If the bike has high mileage, it is likely the chain. Unless it's severe or continues when running, it likely won't hurt anything.
 
Cobranut said:
Actually, the 1330 DOES have hydraulic valve lash adjusters. Not lifters, technically, but they serve the same purpose.

If the bike has high mileage, it is likely the chain. Unless it's severe or continues when running, it likely won't hurt anything.
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You're right. For some reason I thought we were talking about a 998, which obviously, if a person were to read the OP's original post they might know that is not the case.

If I'm only wrong once a day, I'm doing great! My wife would agree with that as well...
 
Well EdMat, if your information is correct, that would be the answer I was looking for. Borys will be ready for his first start up next weekend. If you don't mind me asking, where did you come across this information regarding full throttle stopping fuel injection on start up.
 
Hey Flier, and anyone interested. Take a moment and Google or ask AI, about the term "clear flood mode". It's standard programming in pretty much any fuel injected engine's ECU. Motorcycles, passenger vehicles, whatever. (No, I don't know about race cars.) It does what it says. Even though rare for a fuel injected engine, it allows a way to clear a flooded engine.

BRP calls this mode "Drowned Mode". If you do an electronic word search of your Service Manuals, it appears as far back as 2010. It is used to clear a flooded engine; to fog an engine for long term layup; to do electrical/starter/battery testing; or when you want to turn over the engine without it starting. There is a Caution to limit the starter operation to 5 seconds each, in order to prevent overheating.

Drowned Mode
This special mode can be activated to prevent fuel injection and ignition while cranking. Proceed as follows to activate it.
With ignition switch turned ON while engine is stopped, twist and HOLD throttle at WOT position.
Press the start button and hold to crank engine.
The mode is now on.
Releasing throttle will bring back the normal mode.

How effective this is as a pre-oiling operation is debated everywhere. Some mechanics do this after an oil change to re-fill the filter housing, where-as others say it's not required. I've never heard of a manufacturer actually endorsing or requiring this for pre-oiling or filter priming.

So Flier, it's going to be as effective as you want to believe it to be. I started mine up last week after 5 months and it didn't make a single rattle. So, how would you know if it helped or not. And remember, the oil filter housing is going to be drained down after 5 months. No oil is getting anywhere to your engine until that fills up first. And how many 5 second jogs will that take?

Just don't burn up your starter. Good luck.
 
+3 as Edmat and Snowbelt have said, just hold the throttle wide open and crank it until the oil light goes out, then a couple more, and when you start it, that noise will not happen.
 
EdMat said:
RTFM. It's in the manual for mine. That's "read the fine manual" BTW... 🤣
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That's not how I read RTFM. LOL

Flier Tuck said:
Well EdMat, if your information is correct, that would be the answer I was looking for. Borys will be ready for his first start up next weekend. If you don't mind me asking, where did you come across this information regarding full throttle stopping fuel injection on start up.
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This is common on EFI vehicles.
Try it on your car sometime.

pegasus1300 said:
+3 as Edmat and Snowbelt have said, just hold the throttle wide open and crank it until the oil light goes out, then a couple more, and when you start it, that noise will not happen.
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My 2015 does not light the oil light before cranking.
That concerned me at first, and I still don't like it, but it seems to be normal for these bikes.
I added an oil pressure gauge anyway.
 
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