Yes

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Doable with it on, but not much room. Taking the tank off is easy once I figured how. Much more room and better socket angles.

 

Spend a little bit more $ and upgrade to Iridium pugs, and I recommend one heat range colder as I have found the plug runs a bit cooler and that is especially helpful in a modified engine. Now bear in mind the engine DOES NOT run cooler, the plug dissipates more of it's heat into the heads. This is an age old and common thing to do on air cooled engines. I run these in my stock piston TS111 and it shows just the right amount of heat dissipation.

The appropriate Iridium with the one heat range colder is the
DCPR9EIX.

RACNRAY

 

The appropriate Iridium with the one heat range colder is the
DCPR9EIX.

RACNRAY

JR17 and RACNRAY, Are you still using the Iridium DCPR9EIX and if so what is your opinion after putting some miles running them?

I'm thinking they might do well in a BBK bike.

"According to Champion Spark Plugs, for normally aspirated, gasoline-fueled engines, a good rule of thumb is to go about one heat range colder for each full point in compression ratio increase from 9:1 through about 12.5:1, and two heat ranges colder for each point increase between 12.5:1 and 14.5:1 "

Going from a 111 (9.5:1) to a 116 (11.1:1) it seems that would make since, or at least be worth a try.

Thanks,
Mick

 

what do you recommend for a gap?

 

I use a 3 inch wobble extinction with a spark plug socket that has the rubber insert to help pull out the plugs.... (The plugs are deeper in the cylinder then you think) ... Not a lot of room but no problem changing out the plugs without lifting the tank. The plug wires take a little wiggling and maneuvering to get them out of the cylinder but they're flexible enough to get them out... **** luck... -JR

Thanks RacnRay on the plug recommendation for the 111, I took you up on it... -JR

 

RACNRAY can speak specifically on the heat range to compression ratio recommendations from a tech side... I can give you real world experience... My gas mileage immediately improved from around 39 mpg to 41.9 mpg ( That's using 93 octane in a 111 with stage one A/C, slip-on's and factory tune). Quick fire up at start no matter what the air temperature has been.... As low as 32 degrees during some morning start up in the mountains. I didn't really notice a decrease in heat coming from the cylinders, then again I didn't have a major issue with heat to start out with as some have noted.... I have around 12K miles on the plugs so far and will replace them soon with the same plugs... Thx -JR

 

I just put those Iridiums in my 116 and I don't seem to have the knock/ping anymore on a hill. Going on a long ride in the mountains middle of July so that will be the true test.

 

Just changed mine for the second time yesterday after another 20,000 miles.I think it took me all of ten minutes the first time I did it.However,be carefull NOT to DROP the old plug [or the new plug] into the cover over the head where it screws into.I did just that yesterday which took me a good couple of hours to fish the old plug out using magnets and a pair of long needle nose pliers.Most embarrassing!! DUH!!! You'll see what I mean when ya get into the job.But nothing has to be removed other then pulling the plug wires off the old plugs.So if ya pay attention, [unlike dummy me DUH] and take your time,changing the plugs is actually a piece of cake to do.And don't forget to sparingly apply alittle never seize on the plugs threads and die electric grease into the boots before ya push em back on to the plugs.

So! Why would ya wanna do that?? Cause the next guy that changes those plugs again,just might be YOU!! lol Dave!!!

 

For fishig plugs out of deep holes and reposition the new ones I use rubber hose like used for the vac lines at car engines, to put the hose over the spark plug contact nipple (or threads).
It fits tight enough to carry the plug and do some windings.

 

The hole itself where the plug fits down into wasn't what I was referring too.If ya look at the top of the motor after you remove the plug wire,you'll see a space on either side of that plug hole.That's what I was referring to and is where the spark plug could end up if ya dropped it out of the spark plug socket it like I did.I thought about leaving the old plug in there if I couldn't get it out,but I knew dam right well it would rattle around and drive me nuts.lol The idea of me posting this was so anyone reading this would pay alittle closer attention so they did NOT lose the plug in that area like dummy me did.lol lol
If ya do,it can be retrieved,but will take alittle patience and a few choice words that no one has ever heard before.lol lol

 

I have been lucky to have this magnetic spark plug socket:

Check this out at Amazon.com
Coolrunner 16mm Magnetic Thin Wall Universal Joint Swivel Spark Plug Socket Removal Tool 12-Point 95mm Length, 3/8-Inch Square Drive, CR-V Steel Coolrunner 16mm Magnetic Thin Wall Universal Joint Swivel Spark Plug Socket Removal Tool 12-Point 95mm Length, 3/8-Inch Square Drive, CR-V Steel: Buy Online at Best Price in UAE - Amazon.ae

with a swivel scket wrench adapter it has the perfect length and flexibility to do even the front plug without hassle!

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Good idea except for one thing! The socket shown in the above picture, is 12 point.What's wrong with that?? If the plug has been in there for a while,or the last guy that put it in used a four foot breaker bar to tighten em,lol,and or, was really dumb and used loctite on the threads,[don't laugh cause I've actually seen guys do things like that ,DUH!!!] when the next guy tries to take em out ,especially when using a 12 point socket,the socket will slip and round the corners off on the plug,and THEN your screwed.That's why I will only use a 6 point plug socket,never-seize on the threads, and never,NEVER over tighten em .

 

Well, you could use your 6 pt. socket with the 4 ft. breaker bar, and add on a 4 ft. piece of pipe & sledge hammer too if ya want , to just break the plugs loose. Then go with the 12 pt. magnetic set up that cmoalam put the link to, to install the new plugs

 

All of that and MORE!!! lol lol

 

Didn't expect to stir up that much [emoji1787]

My dealer tech managed to strip the oil drain plug thread ... but when I went to change my spark plugs they were LOOSE (both of them).

I did not need a wrench to unscrew them ... two fingers at the socket adapter was all.

Tightening the new ones down was just finger tight then just a quarter turn to crush the washer.
Nothing which would overwhelm a 12pt socket later replacing them.

Still mad at the "tech": cranking the 12mm bolt in that thin oil pan down and stripping the thread and letting the sparkplugs just "sit there". The rear one was certainly blowing by ... there was grey residue all over the nut and upper part.

NOT letting anyone near my engine anymore ... NEVER again! [emoji2959]

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I think it's time to find a new dealer!!

 

hhh ... here in the region anything not HD is being worked on by untrained and underpaid poor fellas.
(And HD and Polaris/Indian are owned by the same family here. Enough HD riding folks here telling stories about their shop experts too ...)

So ... in short ... a biker here needs to put up his sleeves and get his hands dirty! (if he loves his bike and intends to ride it for more than 2 years...)
So far I did most of my mods myself (except the cam swaps which once got ugly, because said tech dropped a pin into the engine case. it took him a day of trembling and cursing to fish it out with a magnetic tool), but I thought oil changes and regular maintenance service do not need a master degree. (and I wanted to avoid dealing with the flimsy oil pan)

Now lesson learnt. They do not deserve trust and money for even the simplest jobs. (which in the long term hits their workshop hard ... if all customers turn their back. worried about their sustainability now ...)

I must add though ... did 80000 kms on my skoot from brand new. The next maintenance action items are on me!
(need to check my front rotors, forks and belt ... soon)

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I just received my six point,3/8 drive "MAGNETIC" 5/8 spark plug socket ,yesterday.I tried it out on a couple plugs I had layin around and it WILL DEFINITELY do the trick.So ounce again, I would like to thank the gentleman who brought this magnetic spark plug socket to my attention. Dave!!!