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Question Posted By: HD3006 on 4-23-2010
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| Make of Bike: |
HD |
| Model of Bike |
sportster |
| Year of Bike |
2001 |
| Engine Size |
1200 |
| Other info on Bike |
|
| What's your question? |
Engine cuts out backfires.
Top end end just redone
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| Details: |
I just had the top end done on my 01 sporty 1200. Problem is when I'm going down the freeway at about 70 - 80 mph the engine will occasionally start to cut out and backfire. It sounds like a top fuel dragster. The shop that did the work replaced the old HD spark plugs with NGK ones. According to NGK's website the plugs the shop used are a direct replacement for the HD plugs. My question is can anyone tell me if the NGK plugs are hotter than the HD plugs even if they are a direct replacement? By direct replacement I mean same heat range. According to the HD manual a plug that is to high of a heat range can cause this. Yes I plan on taking the bike back to the shop. The bike did sit for nearly 6 months before getting the work done but I did put stabilizer in the gas and I started it every week or so. Yes I did remove all the old gas [ from the carb too] and put new gas in along with carb cleaner but the prob persists. I did not have this problem before getting the work done.
Sorry for the long post and Thanx in advance. If this question got posted up more than once please delete the first one. Thank you |
Answers:
- Did you get your bike back assembled...or did you have the top end done and reassemble it yourself? By: 47Knuckle-Dragger on: 4-23-2010
- I got it back assembled. I think I found the prob anyway. Worn ign switch. I was testing for power at the coil and I would just barley touch the key and the power was going on and off. I started the bike, taped up the key and rode it for several miles tonight with a prob. Thanx for the reply Knuckle By: HD3006 on: 4-23-2010
- And people I promise I will try to keep the description shorter from now on. Thanx to all who at least looked at this. By: HD3006 on: 4-23-2010
- Intermittent problems are the hardest to find, especially the ones at speed that have no rhyme or reason. I'd say you not only lucked out finding the problem yourself, but saved yourself a lot of back and forth to those you trusted with your ride. The last thing a shop wants is a come-back. As to the NGK being the same heat range as the OEM plug, only NGK knows that. You can, however, pull your plugs every few hundred miles and see how they're doing. I find most shops carry NGKs because NGK sponsors a lot of racers and it makes it look cool to install NGK plugs. Actully, most shops that carry NGK plugs do so because they're really cheap with a bulk order. Here's the URL for NGK's FAQ. By: 47Knuckle-Dragger on: 4-24-2010
Reads: 1378
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