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Discussion Starter #1
Have a '98 Aspy with 127K and don't know the history. Running good, no miss but only appx. 36 mpg. Thought maybe new plugs would help the mpg. What say ye? Which plugs do you recommend.
 

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35 to 40 mpg is about the average with a 1500. Some get more, some less depending on your driving habits. So you are in the range. I sure it would not hurt to throw a set in, but then again, if it ain't broke...... Your choice. Ride safe..
 

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After doing some searches some guys say they are getting 40-50k from a set of plugs. Seems a little high to me, but that's what I found.
 

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I've been using NGK5129 DPR7EA-9 it's the same as the OEM plug. I change them every 30,000 miles or so. I always have a couple sets in the shop, if the mod strikes I change them sooner.
If you haven't already you might want to change the fuel and air filters while you are at it. Then you know where you are. Just a thought.
From the Northwest Corner
Ron
 

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Discussion Starter #5
Ron, I have K&N air filter and have just cleaned and reoiled it. Where is the fuel filter?
 

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fuel filter can be seen from the fuel access door, easily changed when the false tank is off.
 

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Golddigger:Whacker is right. You have take the seat and the false tank/radio/gas door, unit off.
Here is a tip that might save you some grief when changing the fuel filter. In the past I've found some that have a tiny sharp little ridge on the input and output fitting it runs the length of the tube, you can easily feel it, it is the result of injection molding in manufacturing. Use some fine sand paper and remove all of it. I know of at least three bikes that have leaked gas because of this, simply sanding the edge off solved the problem
From the Northwest Corner
Ron
 

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Discussion Starter #8
I don't know what you are calling the "false tank" please explain a little further.
 

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They are the plastic pieces that are below the radio. They are in place of the fuel tank seen on older/smaller bikes.
 

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Gold Digger: It the thing that cover the Air Filter box, it has the Am/Fm radio, tape player and the door to the gas cap. You had it off when you cleaned your air filter.
On ever 1500 I've worked on you have to remove the seat to get at the two acorn nut that hold the back end of the unit down, there are also two levers inside the gas filler door that have to be moved forward to release the unit from the bike. Also be sure to remove the plastic filler that are attached to the unit that act as fillers around the fork tunnel.
Happy New Year to you.
From the Northwest Corner
Ron
 

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At 2800 rpm (about 69mph) I get about 40-45 mpg depending on the wind. at 3500rpm I get 30-35mpg.
Every 6,000 miles or once / year I pull the tupperwear and check all hosses and give her a tune up. Clean the K&N air filter and change the pludg. Check timing e.c.t. Then do a complete lube change. Check the bearings and clean her all up. Probably not needed this often but it is a spring time ritual for me.
 

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Service manual shows replacement at 8000 miles. Standard condition plugs are NGK DPR7EA-9 or ND X22EPR-U9. Gap is .8mm-.9mm/.031"-.035".
 

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Service manual shows replacement at 8000 miles. Standard condition plugs are NGK DPR7EA-9 or ND X22EPR-U9. Gap is .8mm-.9mm/.031"-.035".
8000? hmmm...Changed mine after the first season, had 9-10k on them, showed them to my mechanic and he said that he wouldn't have changed them. Have gone 2 seasons on this set, will be changing them before next season just because!
 

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1993 Owners manual says, Change oil and filter every 8000 miles, Air Filter every 12,000, and spark plugs every 8,000.
Kind of an over kill on the Plugs and Air Filter, I think anyway.
8,000 miles on the oil and filter in my opinion is way over, do mine every 3,000 to 4,000 unless I'm on a long trip.
Checked my Maint. Log looks like I've been changing plug every 40,000 to 50,000.
Still running great at 170,000 miles
From the Northwest Corner.
Ron
 

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I change the oil only at 2500mls. Oil and filters at 5000 mls. Plugs at 10000mls. My bike is getting up in mileage 140k and burns oil. 250ml in 1000mls. So I think instead of putting clean oil into dirty oil I just drain it. My motor works a lot harder at 4500-5000 rpms so is probably working twice as hard as a wing and needs more maintance. Going by the plugs one cylinder is burning more than the rest.
 
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