Necro1300R
Registered
Hi friends, I'm new to riding and new to owning a bike, specifically the Hayabusa. Please spare me your comments about a new rider on a Hayabusa. Admittedly, I wasn't really all that into motorcycles at first, but I stumbled across a couple of Youtube channels where riders cruised at leisurely speeds and enjoyed the sights. I really wanted to be a part of that, as car cruising is fun but not quite as engaging as I'd hope. I knew I wanted a sport bike because I like their aesthetic; I was going to let the Hayabusa be a dream bike until I got my feet wet with something smaller and more reasonable. That being said, I was in the market for a bike and this 'Busa happened to appear on the marketplace for an absolute steal of a price. That being said,
"It ran when parked."
And here I am with an $800 'Busa in the back of my truck. The owner didn't have a lot to say about it and quite frankly I didn't ask. What I know, is that it sat for years and he pulled it out from under a lean-to from behind a clutter of other small engine vehicles with two flat tires, a bunch of missing fairings, and a whole lot of history written all over it in the form of road rashes. I didn't want to buy brand new not for fear of dropping the bike, but I like working on things and wanted a bike I could wrench on before riding such that I could get 'closer' with it per se. The old adage of 'ran when parked' is a red flag for most but I indulged it 'cause I wanted to work on something and needed a hobby. Sure enough, I get it home, throw a battery and some fuel in it and it cranked right up and ran. Noticeable misfire, but nothing crazy. I could've, and in the eyes of some maybe should've left it like it was and had my fun with it. Unfortunately, I'm a bit slower in the head than that.
So what was wrong with the bike?
First thing I did was a really hap-hazard job of rewiring the fuel pump that had been simply hardwired into the harness. That's right, they clipped out the harness that was there and hardwired the fuel pump directly into the main harness. I've chalked that up to paranormal crack-tivities. I don't know any reason other than drugs that you'd want to do that without any other notable modifications being done to the bike. My poor soldering and liberal use of soldering joints has held up thus far, but may be related to the problem. Second, replaced the fuel pump entirely and performed the filter bypass mod, opting to go with an inline filter outside of the tank. What cracked me up the most was seeing that the last guy had placed an inline filter in the bike without actually performing the drilling part of the mod. Interesting, but see my last explanation for such erratic behavior. So I performed the filter mod properly. Changed out the inline filter. In this time, I learned that my fuel pressure regulator is zip-tied in. At first, I wanted to dog on the poor guy for doing that to the fuel pressure regulator. I questioned why he'd do that when all it needed was a plastic piece. As it turns out, I couldn't find just the clip and a full on assembly is a couple hundred bucks. I'd never doubt his genius again. I quickly re-zip-tied the fuel pressure regulator back into place and further secured it with self-healing tape. Cool, with the pump replaced and re-wired, I figured I was done with that. I then changed fluids and gaskets. Simple task, save for smashing my fingers in-between the stator cover and the casing a couple times. This solved my oil leak issues. Up next, I ordered new tires to go on the bike. This quickly bloomed into ordering several new rims, because he used slime to patch previous issues with the old tires and left it to sit for years. Turns out, it'll eat the aluminum after some time. Naturally, I tried to go the cheap avenue via e-bay and got burned a couple of times with the rims that showed up (tragic, I know). Ended up replacing the rear dampers with a new set of rear dampers because ole boy was missing three and the three that were there were torn up and likely not worth a damn.
So what's the issue now?
Well, it all goes back to that misfire. With each start of the bike it became harder to start and ran worse. The last time I got it to run for any extended period of time, it idle very poorly and after a couple minutes of sitting idle the coolant boiled over before it died the moment I put it in gear.
Now it refuses to start without starting fluid and won't stay running.
Things I've done in an attempt to diagnose and resolve this:
"It ran when parked."
And here I am with an $800 'Busa in the back of my truck. The owner didn't have a lot to say about it and quite frankly I didn't ask. What I know, is that it sat for years and he pulled it out from under a lean-to from behind a clutter of other small engine vehicles with two flat tires, a bunch of missing fairings, and a whole lot of history written all over it in the form of road rashes. I didn't want to buy brand new not for fear of dropping the bike, but I like working on things and wanted a bike I could wrench on before riding such that I could get 'closer' with it per se. The old adage of 'ran when parked' is a red flag for most but I indulged it 'cause I wanted to work on something and needed a hobby. Sure enough, I get it home, throw a battery and some fuel in it and it cranked right up and ran. Noticeable misfire, but nothing crazy. I could've, and in the eyes of some maybe should've left it like it was and had my fun with it. Unfortunately, I'm a bit slower in the head than that.
So what was wrong with the bike?
- The wiring harness was a mess, specifically from the harness to the fuel pump, as well as a few stray wires.
- There was an inline filter on the fuel hose, but the actual filter mod had not been performed.
- The kickstand sensor is zip-tied closed.
- Both tires are flat and dry-rotted.
- Needs an alignment
- Leaked oil all over the bed of my truck.
- Misfire.
First thing I did was a really hap-hazard job of rewiring the fuel pump that had been simply hardwired into the harness. That's right, they clipped out the harness that was there and hardwired the fuel pump directly into the main harness. I've chalked that up to paranormal crack-tivities. I don't know any reason other than drugs that you'd want to do that without any other notable modifications being done to the bike. My poor soldering and liberal use of soldering joints has held up thus far, but may be related to the problem. Second, replaced the fuel pump entirely and performed the filter bypass mod, opting to go with an inline filter outside of the tank. What cracked me up the most was seeing that the last guy had placed an inline filter in the bike without actually performing the drilling part of the mod. Interesting, but see my last explanation for such erratic behavior. So I performed the filter mod properly. Changed out the inline filter. In this time, I learned that my fuel pressure regulator is zip-tied in. At first, I wanted to dog on the poor guy for doing that to the fuel pressure regulator. I questioned why he'd do that when all it needed was a plastic piece. As it turns out, I couldn't find just the clip and a full on assembly is a couple hundred bucks. I'd never doubt his genius again. I quickly re-zip-tied the fuel pressure regulator back into place and further secured it with self-healing tape. Cool, with the pump replaced and re-wired, I figured I was done with that. I then changed fluids and gaskets. Simple task, save for smashing my fingers in-between the stator cover and the casing a couple times. This solved my oil leak issues. Up next, I ordered new tires to go on the bike. This quickly bloomed into ordering several new rims, because he used slime to patch previous issues with the old tires and left it to sit for years. Turns out, it'll eat the aluminum after some time. Naturally, I tried to go the cheap avenue via e-bay and got burned a couple of times with the rims that showed up (tragic, I know). Ended up replacing the rear dampers with a new set of rear dampers because ole boy was missing three and the three that were there were torn up and likely not worth a damn.
So what's the issue now?
Well, it all goes back to that misfire. With each start of the bike it became harder to start and ran worse. The last time I got it to run for any extended period of time, it idle very poorly and after a couple minutes of sitting idle the coolant boiled over before it died the moment I put it in gear.
Now it refuses to start without starting fluid and won't stay running.
Things I've done in an attempt to diagnose and resolve this:
- Changed the spark plugs
- Tested the ignition coils with a multi-meter. (Each coil was 1.6 and 12.56 with a .4 reduction due to meter resistance.)
- Checked fuel pressure before and after the inline filter. 48-52 psi before the filter, 44-46 psi after the filter.
- Double checked that all appropriate connections and lines are hooked up at the airbox.
- Checked that the fuel injectors were spraying.
- To my knowledge, it doesn't have any serious aftermarket mods like a power commander. I can't get into the back hump storage to actually take a look, but there's no extra wiring that I've seen at the ECU nor coils.
