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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen 1 (2004) Handlebar Vibrations
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<blockquote data-quote="TownsendsFJR1300" data-source="post: 1306849" data-attributes="member: 1003"><p>A tip when syncing the engine. Besides at idle, <strong>hold the throttle up to about 4K and adjust at that RPM.</strong></p><p></p><p>You'll likely find them off a bit. After 4K, the sync doesn't make much if any difference.</p><p></p><p>The balance should also be within 10mm's. You can adjust and get both well within that spec.</p><p></p><p>I also have the Carbtune and with some effort, got all 4 TB's within 2-3mm's @ 4k and idle. The closer, the smoother. I'll put a heavy duty fan in front of the radiator, on high, as I want the engine as close to normal operating conditions as possible when adjusting.</p><p></p><p>Last tip. Before I had the Carbtune, I had to pay the shop for a sync when I was having some running issues (under warranty). They couldn't find the problem (it was a corroded electrical connector under the tank). Now, once I got the Carbtune, I did my FZ and double checked my 04 FJR.</p><p></p><p>They did <strong>NOT ADJUST THE AIR SCREWS, but <u>one butterfly screw</u> </strong>(a big no no per the manual), apparently as it was easier to get to. This was very apparent as Yamaha puts a dab of white paint on those screws. The paint was chipped and the butterfly was obviously adjusted approx 1/4 turn. I put it back to stock and re-synced with the air screws (as it should have been). This was a regular YAMAHA SHOP...</p></blockquote><p></p>
[QUOTE="TownsendsFJR1300, post: 1306849, member: 1003"] A tip when syncing the engine. Besides at idle, [B]hold the throttle up to about 4K and adjust at that RPM.[/B] You'll likely find them off a bit. After 4K, the sync doesn't make much if any difference. The balance should also be within 10mm's. You can adjust and get both well within that spec. I also have the Carbtune and with some effort, got all 4 TB's within 2-3mm's @ 4k and idle. The closer, the smoother. I'll put a heavy duty fan in front of the radiator, on high, as I want the engine as close to normal operating conditions as possible when adjusting. Last tip. Before I had the Carbtune, I had to pay the shop for a sync when I was having some running issues (under warranty). They couldn't find the problem (it was a corroded electrical connector under the tank). Now, once I got the Carbtune, I did my FZ and double checked my 04 FJR. They did [B]NOT ADJUST THE AIR SCREWS, but [U]one butterfly screw[/U] [/B](a big no no per the manual), apparently as it was easier to get to. This was very apparent as Yamaha puts a dab of white paint on those screws. The paint was chipped and the butterfly was obviously adjusted approx 1/4 turn. I put it back to stock and re-synced with the air screws (as it should have been). This was a regular YAMAHA SHOP... [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen 1 (2004) Handlebar Vibrations
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