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Post subject: 31k spark plugs and tyre size?
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Mortenp  Suburban Commuter Joined: 12 Apr 2008 Total posts: 66 Location: Drammen, Norway |
What spark plugs and grade is the best for running on a 31k?
And what tire size does people here use? I've searched that the BT45 is a great tyre for the RD but what dimention is the best? Standard 110-80-18 front and 120 rear?
Thanks for the input!!
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Posted: Tue Apr 22, 2008 7:35 am
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adee56 Daily Burner Joined: 17 Jun 2006 Total posts: 111 Location: Perth Western Australia |
Standard size tyres work, BT45 ok on the road.
Front 90/90-18
Rear 110/80-18
Big tyres take longer to warm up.
Plugs NGK BR8ES
tyres have been discussed before
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Posted: Tue Apr 22, 2008 9:57 am
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adee56Daily Burner Joined: 17 Jun 2006 Total posts: 111 Location: Perth Western Australia |
search using
Tyre size choice lc
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Posted: Tue Apr 22, 2008 10:05 am
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MortenpSuburban Commuter Joined: 12 Apr 2008 Total posts: 66 Location: Drammen, Norway |
Thanks!
M.
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Posted: Tue Apr 22, 2008 10:07 am
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SEB4LO All-gear Wheelie! Location: FRANCE - QUIMPER |
| adee56 wrote: |
Plugs NGK BR8ES
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Forget the BR8ES
BR9ES or EVX only 
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Posted: Tue Apr 22, 2008 10:40 am
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| Rich |
or BR9EIX 
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Posted: Tue Apr 22, 2008 10:42 am
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adee56Daily Burner Joined: 17 Jun 2006 Total posts: 111 Location: Perth Western Australia |
I better try some different plugs
thanks
adee
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Posted: Tue Apr 22, 2008 11:07 am
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MortenpSuburban Commuter Joined: 12 Apr 2008 Total posts: 66 Location: Drammen, Norway |
| SEB4LO wrote: |
| adee56 wrote: |
Plugs NGK BR8ES
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Forget the BR8ES
BR9ES or EVX only |
Why is this? The BR9 is a "hotter" plug, or am I wrong?
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Posted: Tue Apr 22, 2008 11:46 am
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TygerTungDaily Burner Joined: 21 Sep 2005 Total posts: 198 Location: Christchurch, New Zealand |
Nah the 9 is a colder, the higher the number the colder the plug.
9 is the coldest commonly avaliable plug, and it shouldn't foul up, even around town.
You can get 10's as well, but they arn't required for a stock engine.
I always use 9's
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Posted: Tue Apr 22, 2008 12:58 pm
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adee56Daily Burner Joined: 17 Jun 2006 Total posts: 111 Location: Perth Western Australia |
NGK web site below should be a good guide.
I have been told before colder plugs are better provided they don't foul.
http://www.ngkpartfinder.co.uk/index.php
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Posted: Tue Apr 22, 2008 1:21 pm
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Thrasherg Powerband Master Joined: 18 May 2007 Total posts: 620 Location: Austin, Texas |
I ran 9's in my 31K and it would foul up every couple of hundred miles, I changed to 8's (recomended by my Dyno operator AF1) and have not had any problem in over a 1000 miles.. 9's may be okay, but 8's don't seem to do any harm and run great. My dyno operator said "everyone belives that putting in a cooler plug will magically make the engine run cooler, it Doesn't, it makes the plug run cooler!" He has been tuning engines for many years so I took his advice, no regrets so far. If you are doing a lot of around town, stop/start driving I would go for the 8's, otherwise take the 9's.
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Last edited by Thrasherg on Tue Apr 22, 2008 2:01 pm; edited 1 time in total
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Posted: Tue Apr 22, 2008 1:54 pm
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SEB4LOAll-gear Wheelie! Location: FRANCE - QUIMPER |
| Thrasherg wrote: |
| I ran 9's in my 31K and it would foul up every couple of hundred miles, I changed to 8's (recomended by my Dyno operator AF1) and have not had any problem in over a 1000 miles.. 9's may be okay, but 8's don't do any harm and run great. My dyno operator said "everyone belives that putting in a cooler plug will magically make the engine run cooler, it Doesn't, it makes the plug run cooler!" He has been tuning engines for many years so I took his advice, no regrets so far. If you are doing a lot of around town, stop/start driving I would go for the 8's, otherwise take the 9's. |
most of the engine use decked/shaved head
run 8 and hole a piston or both 
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Posted: Tue Apr 22, 2008 1:59 pm
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