Yamaha Road Star Raider Motorcycle Forum

Raider Categories => Technical Discussion => Topic started by: TeleMan on Jul 05, 2020, 02:03:32 pm

Title: How much trouble am I in?
Post by: TeleMan on Jul 05, 2020, 02:03:32 pm
I went to change the plugs and air filter on my 2011 Raider with ~48,000kms on it yesterday and everything was going smoothly until that dreaded rear right plug.  The old plug came out fine but the new one would get about 2 turns by hand in and then bind.  After much trial and failure with taking the new plug out, checking the angle/threads etc, I determined that the threads in the head had been damaged, perhaps when the dealership had performed my 25,000km service.  My buddy (who is much more mechanically inclined than myself) came over and we determined we should try to clean up the threads with a tap.  Fast forward to this morning and we tried tapping about half the threads in the head (with the threads looking much better than they had previously).  I know that a reverse tap would have been a better idea as there are less chance of metal shavings getting in to the head, but we used a small hose and a shop vac to hopefully clean out whatever shavings had gotten in to the cylinder.

The new plug threads in further than before but we can't get it in fully, and we didn't want to force it and potentially damage the threads further.  So, all that to say it looks like I may have to pull the head to have the hole tapped properly.

Has anyone had to do this and is pulling the head possible without removing the entire motor from the bike?  It's likely something I'll have done at a shop because I have little desire (and even less time) to be able to do this type of work
Title: Re: How much trouble am I in?
Post by: A.T. on Jul 05, 2020, 03:30:03 pm
Have never had to do this BUT in the manual it appears this can be done w/engine on the bike. 

If you can get a tap in there, grease the flutes to capture the shavings.  But it really sounds like you are mis-aligning the plug on install.  Use a rubber hose on the plug, and take your time..the right rear is at an awkward install angle. 

Title: Re: How much trouble am I in?
Post by: TeleMan on Jul 05, 2020, 04:41:57 pm
I did try the rubber hose trick, to no avail unfortunately. We tried the old plug too to see if it had something to do with the threads on the new plug, and that also didn't work.  To save any further damage from my fleeting attempts, I will probably call a shop and get it towed to get the work done...hopefully my wallet doesn't have to take too hard a hit.
Title: Re: How much trouble am I in?
Post by: ROADKILL on Jul 05, 2020, 06:52:07 pm
I'm assuming you have the tank off right? If yes then that's all I have to add.
Title: Re: How much trouble am I in?
Post by: TeleMan on Jul 07, 2020, 09:09:35 pm
So it looks like I'm gonna have to pull the heads and re-tap this plug hole....FML.. does anyone have any tips/insight/experience in doing this?
Title: Re: How much trouble am I in?
Post by: sundancer87 on Jul 07, 2020, 09:45:53 pm
I have installed Heli Coils with in heads in place.  The trick is to bring the piston TDC, pack the flutes of the tap with heavy grease and tap the coil threads and install the coil.  Be mindful the piston is TDC and you don't need to tap more than it will take to install the coil.  Measurements won't hurt before you start.

As mentioned before, the grease will trap the cuttings in the tap so very little will, if any, will drop into the cylinder.
With a mirror and a strong light you may be able to look into the cylinder to make sure there aren't any cuttings.

If you feel the need to pull the head then it will be a straight forward installation of the Heli Coil.  Don't bother with trying to chase the old threads, install the coil that has full clean threads.
Title: Re: How much trouble am I in?
Post by: Pir8 on Jul 29, 2020, 09:04:17 am
Perhaps buy a used head? 


Just stumbled on this looking for something else, and thought of this post.  NO RELATION to the seller, NOT an endorsement of the seller, just a potential solution to the issue.