I think your diagnosis is correct.
It sounds to me that the cenrifugal clutch is not working. This is the device that makes the power valve open and close.
It is situated behind the water pump, and is a non-service item.
It works in a similar way to the automatic clutch on a scooter
Enjoy your ride !
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www.triumphtwinpower.com/bonnevillet100-performance-tune-3.php?... Rating: 5 - 44 votes
I removed the O2 and AIS on my 2009 SE Bonnie. ... First thing I noticed was the smooth idle, next was the deeper exhaust note from my TEC 2:2 .... The power increase all over the band was very good , no popping or back fire at low rev's and
is a proper way to start the engine. Four controls are on your bike to assist
in starting. Below are generic instructions.
The choke, used
when the engine is cold. Pull the red knob for choke.
The " Hot
Start " Lever, used when the engine is hot. Pull the lever to lean
the fuel mix when the engine has been running.
lever, always used.
The throttle, used
to prime the cylinder, (power valve).
kick, instead, push
the kick lever downward. You will feel the back pressure as the piston is going
upward on the compression stroke to the point the pressure is great enough that
the kick lever "locks up". You are very close to TDC. NOW, pull in
the de-compression lever. Push the kick lever a little bit more to get the
piston past TDC. Now release the de-compression lever. Give the throttle a 1/4 turn then let it snap closed. A diaphragm,
(Power valve), in the carb gives a shot of gas when this is done. DO NOT
do this multiple times because you will flood the engine. Leave the
throttle closed when kicking. A flooded engine will often
backfire. Now give a strong kick through the full sweep of the kick start
lever. Quickly get your foot off the kick lever at the end of the kick to avoid
any chance of "kickback" from the kick lever. This happens in the
case of a misfire, aka > backfire. It can be very painful, and can even
break a leg. I am serious about that. Repeat the process (but without the
throttle priming), for six kicks. After six kicks go ahead and twist the
throttle again for a second priming. A good battery, a clean spark plug, a
clean carb and clean air filter will also aid in starting. Note that not
all carbs have a power valve. When a power valve is not present you should
crack the throttle open only 1/8 inch from closed on each kick. Please rate my answer.
Yes, you need to bleed the system. Somehow air has gotten in.
First, fill the master cylinder to the full level with brake fluid. Locate the bleeder valve down on the caliper and get out a wrench that fits it. Then pump the pedal several times and hold it down as you open the bleeder valve. Do not let the pedal back up while the valve is open - or else air will be drawn back in. After a few seconds, close the valve and pump the pedal again.
Perform these steps until normal feel to the pedal is achieved. Make sure the master cylinder does not run low on brake fluid while you are doing the bleeding.
The kips is a power valve.
It moved a little when excellerating to actually change the exhaust port timing as the engine revolutions get higher, to gain more power.
If you say it runs good at full throttle, you valve is working, but it may be slow moving if gummed up.
Also, if your jetting is too rich, it will bog down.
The power band is the point wheneverything is nominal and and peak performance is realized. The air/ fuel ratio , timing, rpms It's mor predominant and noticeable in a motorcycle because of handling and weight All engines have them and these "power bands are really the peak of what s also called the torque curve Band meaning sp[ecific point and duration everything is working together. a gas lawn mower engine is set up to run inside this band. Thats why it doesn't fall on its fsce on the first patch of grass.
A diesel engine has a specific rpm range it has to maintain under load to get nominal horses.. If everything is functioning at nominal, max power is put out. Surprisingly enough it can be felt in all engines if paid attention . That's all it is, no special "bands" or parts. Knowing where the power band(range is makes a big difference on any machine. On an electric motor peak torque is @ let's say 1850 rpms. go faster useless lower toyque. go slower power drops To keep the range of the power band constant. everythinhg needs to be constant, like fuel mix, spark plug condition ,air filter andcarb adjustments.. I had a bike I hate and feared the power band. I would fall into it not paying attenyion and it would litterally crawl out from under me. All it is is that narrow band of peak performance..
hi mate check the rings havent gone by using a compression tester take the sprak plug out and screw the guage into the spark plug hole and kick the bike over a few times until the guage goes up no more if it goes over 100psi/7.5 bar thats fine also check the air filter is clean and also take the carb off and just give a good clean e.g the jets etc here is a picture of the compression tester
I had the same problem on my VL1500. I THINK it gets "flooded" with fuel and then the cylinder is full and will NOT turn. I have used jumper-cables to start the bike when it will not turn over.
I now start my bike with this procedure: 1. Do NOT touch the throttle. 2. Switch on the power. 3. Do NOT touch the throttle.
4. Press the "Start" button and crank the engine a little (1 - 2 seconds) 5. Do NOT touch the throttle. 6. Keep cranking the engine (another 1 - 2 seconds) 7. Open the throttle a VERY LITTLE (approx. 1/10 turn of throttle). keep the throttle slightly open while the engine cranks. 8. Keep cranking the engine and wait for engine to start (another 1 - 10 seconds).
It is still not a perfect start, but at least the engine cranks over now.
Remember that the VL1500 has a "decompression" system that opens the outlet valve for 2 cranks of the engine.
I suggest you FIRST make sure the engine cranks over (NO throttle), and THEN concentrate on starting the big V Twin.
sounds like you need a new power valve in the cylinder. They can go bad and thats how they will act. You have to take the cylinder off to change it. If your that far you might as well put a new piston and ring in it.