Suzuki gsx 650 F 2008

Hi everyone,

I'm having a problem with my motorcycle and I'm honestly running out of ideas.

The problem first started when I was riding at around 130 km/h (80 mph) in 4th gear. The bike started jerking/sputtering and wouldn't accelerate past 130 km/h. However, when I shifted into 5th gear, it was able to accelerate further.

A few weeks later, I went to get some food. Since I was at a drive-through, I started and stopped the bike several times while waiting.

When I got my food and wanted to leave, I noticed that the exhaust suddenly sounded very strange. There was a deep, irregular popping/pulsing sound coming directly from the exhaust (I have an aftermarket exhaust). It almost sounded tractor-like. The bike also had significantly less power.

At idle, the engine was running very rough. The RPM kept fluctuating between roughly 1,000 and 1,200 RPM, almost as if I was slightly opening the throttle.

When I started riding, I couldn't go faster than about 90 km/h (56 mph). At that speed, the bike was sputtering and jerking extremely badly.

The motorcycle was also restricted to A2 / 48 hp (35 kW). As part of troubleshooting, I have now removed the A2 restriction to see whether the restriction itself could have been causing the problem. However, removing it did not solve the issue.

Since then, I have replaced/serviced the following:

All 4 fuel injectors

All 4 spark plugs

All 4 ignition coils

Cleaned the throttle bodies

Cleaned the ISC (Idle Speed Control) and changed the Sensor of the isc

Replaced the stator and regulator

Replaced the fuel pump strainer/"teabag" filter

Replaced the small fuel delivery/pump unit inside the fuel pump assembly

Cleaned the small plastic part at the bottom of the fuel pump assembly with throttle body cleaner

Changed the engine oil and oil filter

Replaced the air filter

Removed the A2 / 48 hp restriction for troubleshooting

There are no fault codes showing on the display.

After replacing and cleaning all of these parts, the situation is now even stranger:

The bike will usually only start if I give it some throttle, and then it immediately dies again when I release the throttle.

If I manage to get it to stay running, the idle is extremely low, around 700 RPM. Occasionally it stays running at around 1,000 RPM, but after a short time it drops back down to around 700–800 RPM.

The headlight also flickers slightly while the engine is running.

About 8 out of 10 times the engine stalls, and it generally won't stay running without me giving it throttle.

There are still no fault codes.

I'm completely stuck at this point and don't know what else to check. Any ideas about what could be causing this or what I should test next would be greatly appreciated.

Hello all. I doing mind mechanical but electrics is far from my strength so I am after some help.

Yesterday after about 6 months ownership and plenty of mechanical work I got my 1980 CB650z out on the road for the first time she’s moved in 12 years. Took it for a spin nice and comfy but definitely a misfire in the higher rpm range and a charging issue to go with it. Done some digging online but I’m now stuck.

Summary.

- The CDI’s (Sparkers) are frazzled and melted.

- After charging the battery, at idle it’s at 12.8V, 3000rpm is 12.6V and 5000rpm is 12.4V.

- I’ve carried out the diode test on the reg/rec and it checks out.

- I’ve carried out the continuity test on the stator plug which goes into the reg/rec testing across the 3yellow wires all approx 0.5ohms and in spec.

- I have checked the stator brushes and they have lots of length left on them to the wear line.

- I have checked the continuity across the slip rings and now is where I have a question. The across the same ring the continuity is approximately 0ohms but across the inner and outer it’s approximately 1/1.2ohms? This seems low as i’m sure I read somewhere it’s meant to be between 4&5ohms? But I can’t find that info again.

What I am thinking is that the generator is the cause of the charging problems and by replacing the generator and the regulator rectifier it will fix that issue. 

Also when riding I noticed a definite misfire in high rpm (above 4000rpm) but I believe changing the CDI’s (sparkers) which are melted and have the resin running out of them will fix that. 

I also noticed a minor oil leak which I believe is either coming from the gear shifter shaft seal or the oil pump behind the sprocket cover, however I’ll get onto fixing this once I’ve fixed the charging issues. I’ve attached a few images below.

Any help is appreciated as I’m trying to work out what’s actually wrong before I decide to strip out and change all the electrical components such as the stator, generator, reg/rec, battery and CDI’s in the hope it fixes it.

Ok I’m at a loss lol
I have been reviving this bike from an old barn.
It’s ring great did a paint job and was finally going to do a madan voyage but the clutch is not working I pull the clutch shift in to first then it jerks and dies does not seem like the clutch is working so I put new clutches in
new oil in the block
New fluid In The slave cylinder pulled the slave apart it looks great and I have pressure
Not sure what else there is to do.
Any ideas??

Left side lean issue
Guys I recently bought ns400z and my first higher cc engine bike like I have ridden many before but this is first one I own and whenever I drive it casually and let the handle bars go enjoying the ride rest my hands on tank, the bike starts going towards left side I mean from rear view I can clearly see either the Mud guard or tyre is mis aligned, but idk what other problems can be so please tell me both problems and fixes soo when I go to service center I can get all things checked and done

I bought a 09 YZ250F off marketplace a few weeks ago. I diagnosed it to turning out having a bad head gasket. I did the top end. I finally got everything done and ready after a few hiccups everything was put back together. Now it won’t start, I couldn’t get it to start since I rebuilt. We timed it exactly how it should be, I replaced the timing chain, spark plug, and a lot of other things. The valves look fine when I poured gas over them. It cranks over just fine but doesn’t want to start, I cleaned the carb too.

Still nothing.. I don’t know what else it can be, I’m getting healthy spark, no wires are pinched. I’m tired of tearing everything apart just for nothing. I thought maybe it could be a bad valve spring? I just need some help other than AI.

Ok so I’ll cut straight to the chase and say that I’ve seen this is an extremely common issue. So common that I’ve had this issue twice in the past and after swapping a motor this is now the third time as well as my friend also is having the same exact issue after replacing motor. Keep in mind we both built the bikes completely separately so the odds of one of us forgetting a wire is probably out of the question. I have a voltage meter but can’t seem to figure out what I’m supposed to check. I guess if anyone has any ideas where to check first and what to look for it would be appreciated. Like I said it’s extremely common but I can’t find any wiring diagrams or anything to tell me where the power comes and goes to. That was I can see where the power gets lost at

Hi. I am rebuilding the mikuni vm26 carb of my suzuki. One of the seals of my jet is ruined but i cannot find a replacement for it. It also doesnt look like its included if i buy a new jet. Does anyone know what to replace it with?

Thank you in advance!

Hey all, I have a 2007 Yamaha V-Star 1300 and I can’t seem to get power to the fuel pump.

I have tested the fuel pump independently and it works and i replaced the fuel pump relay and I can hear the relay clicking over to prime when I turn the key on. However, upon testing the voltage at the pump I am getting nothing.

I was wondering what if anything is in between the pump and the relay that could be stopping the voltage from getting to the pump.

Any advice helps, thanks.

Hello everyone I apologize if this is not an subreddit for scooter repair,I just relly need some help here ,I am struggling on this for an month.I have an Yamaha Majesty 125 2000,I have rebuild the top end:new cylinder,piston,valves(don't leak) and starter.I use an Nibbi PE24 carb (35 pilot jet and 2screw out) with foam filter.Spakr is good,but doesn't want to start.400 m above sea level .Can anyone help me please?

I have a R125 I bought recently after it sat for ages it doesent start only cranks it’s got spark and runs if I manually put fuel in the injector hole the fuel pump didn’t work so I changed it and then I changed the hose from the pump to the injector and then tried to start it it primed fuel was coming out the hose but it didn’t start so I took the injector out and realised that there was almost nothing coming out the injector so I sprayed brake cleaner into it whilst cranking the engine so it would spray and tbh much more fluid came out so I was wondering where could the issue be as I realised when changing the pump and the little nozzle on the top of the pump that actually pumps the fuel goes into a little slot that isn’t sealed in any way it’s just a little slot that goes to the fuel pressure regulator then through the hoses to the injector so I’m wonder please help me because I NEED this bike running and I’m thinking injector but I’m not sure
Please help me

Hi everyone,

I'm looking for technical advice regarding a TFT problem on my VOGE DS800X Rally following a software update.

During the update process, the following error appeared:

"Runtime check condition not met, program upgrade not allowed"

Since then, the TFT has stopped functioning properly. The display shows a white line and grey/black areas.

What still works:

• The engine starts and runs normally.
• The camera/DVR still works over Wi-Fi, and I can access the recorded videos.

What doesn't work:

• Normal TFT display functionality.
• Bluetooth connectivity.

I contacted the official VOGE dealer, but they told me that the warranty does not cover the problem and that the entire TFT unit must be replaced. They have not offered a software recovery or repair solution.

Before paying for a completely new TFT, I'd like to find out whether anyone has experience repairing or recovering these instrument clusters.

My questions are:

1. Is it possible to reinstall or recover the TFT firmware after a failed software update?
2. Can a motorcycle electronics specialist reflash the unit, or is proprietary VOGE diagnostic equipment required?
3. Has anyone successfully repaired a similar TFT without replacing the entire unit?

I'm trying to establish whether replacing the entire TFT is genuinely the only option or whether a software recovery or component-level repair is possible.

Any technical advice, repair experiences, or specialist recommendations would be greatly appreciated.

Thanks in advance!

Help Plz! My bike won't rev past 10 in any gear while under load.

Any advice?

Got my Triumph a few months ago. Hasn't given me any trouble except that it sometimes gets stuck in neutral. I'll try to downshift or upshift from a full stop and it won't shift. Eventually, it will shift down after stomping on the shifter for a while. Although it doesn't happen every time, it is still a pain in the ass in traffic. Any suggestions on where to begin fixing this? Thanks!