Frequently Asked Questions
The only real fix to the overheating problem is to convert to a water cooled engine. Ever wonder why you see an 18 year old Pulse with no more than a few thousand miles on it.
I hope the following tips and links will help to answer many of your questions regarding repair of these
.................wishing you all the best......Steve Schmidt
LITESTAR & PULSE PARTS LIST....for the Yamaha and Honda Engines.
Engines, Cooling, Vents and Repairs
I'm Thinking about Updating my
Engine in my Pulse.....
Which Engine should I Use???
How I Cooled the Yamaha 400 Engine....by Don Sucha
by Don Muddiman........
There are many possible things that could be wrong, but this is what I would check first.
1) Safety interlocks. Clutch (mounted of the upper clutch pedal area.) Neutral interlock (wire from engine or terminal block bad. there is also a interlock switch mounted at the pivot arm of the clutch)
2) Battery Connections (Ground wire and the B+ side) and or voltage.
3) Starter solenoid and or connections. There are two solenoids on your Pulse. One for the engine and one for reverse.
4) Starter Switch or wire connections.
5) The six fuse Main Fuse Block is another Pulse weak area. The fuse holder is located on the left side of the main steering support. They used the old pinch connectors to hold the fuses in place. These are known to relax and create a bad connection(s). I would remove the fuses one at a time and clean each connector with 600 grit sand paper wrapped around a small tube. Re-bend each connector together to hold the fuse tightly when you reinsert them.
Pulse Outrigger Tires...How to Change...Other Problems and Corrections..... Inspect Yours Today!
How to Change Front tire
Front Wheel....Front End Repair
Removing the BODY
Fiberglass Body Fasteners
Fiberglass Repair Tips
Pulse Logo drawing for making new graphics for your Pulse
Removing Seats and Replacement
Dave Bauer modified his Pulse for better cabin heat by better water management.
In the original Honda-powered Pulse configuration, OMCC simply installed a tee in the thermostat outlet and radiator return lines and ran that water to the front heater core. This resulted in a parallel cooling that neither cooled the engine nor heated the cockpit well. My solution was to run twin radiators for additional cooling AND design a heater supply that took hot water from the upstream side of the thermostat instead of downstream. This traditional automotive design gives me hot water to the heater as soon as the engine starts to warm up, instead of later after the thermostat opens. As a bonus, unlike the original configuration, the system purges air quickly after a coolant flush.
Make your own windshield idea
Towbar for your LiteStar/Pulse
Tom Donaldson reported on Facebook in 2022 that he obtained the replacement rubber spacers for the outriggers from Izzy_USA.com .
Some units have a nose cone and later models do not.
Bob Cervero I have Pulse #61 and it has a separate nose cone with twin non-retractable lights. Don Muddiman's Pulse #199 has a separate nose cone with the Fiero retractable headlight. Pulse #189 does not have a separate nose cone but does have a retractable headlight. It had a removable panel just in front of the front wheel. So there does seem to be several variations of the headlight- nose cone combination. Just like most other things on a Litestar/Pulse. The headlight assembly may be able to be removed from the nose cone. Look inside the wheel well. You'll find 8 bolts/screws up in the nose area. The 4 inner ones are holding the headlight assembly. The 4 outer ones are holding the nose cone on.
As far as your headlight problems goes, mine also has that problem from time to time. The source is in the headlight relay behind the headlight itself. The mechanism came out of a Fiero and was operated by a switch that had both an energized up and an energized down position. However, in the Pulse, the headlight switch has only an energized up type. This means that, as the relay was wired from Pontiac, it would go up, but then not go back down. The engineers at OMCC solved this by putting a jumper wire on the relay to make it go back down. The problem is that this jumper causes the relay to burn out, thus the headlight stays in the up position.
The solution is to remove the relay and clean all of the contacts. It would be even better if you could find a new relay. One other drawback to this problem is that as the relay begins to burn out, your low beam performance begins to suffer. So, not only do you have a headlight that won't drop, but it is also dim.
Owners with the Pop-Up headlight have the Pontiac Fiero curse. These headlight mechanisms came from Fieros and are well known to have problems. If yours does not work there are several possibilities.
1. The system is not getting power. Check your fuses and see if you are getting power to the back of the headlight switch. If you are, check the multi-pin connector under the right side of the dashboard for continuity. If you are still getting power there, the problem is in the headlight assembly.
2. There is a relay in the assembly next to the actuation motor that may have failed. This keeps the motor from getting the voltage it needs to operate.
3. The actuation motor itself may have failed.
If the problem is either 2 or 3, you are in bad shape because the motor cannot be operated with the light down. If you look closely into the top, rear portion of the light, you can see the knob on the top of the actuation motor. If you could manually operate this, you could get the light to pop up. I doubt that you could build a tool to do that manually. Try this solution.........
The headlight assembly may be able to be removed from the nose cone. Look inside the wheel well. You'll find 8 bolts/screws up in the nose area. The 4 inner ones are holding the headlight assembly. The 4 outer ones are holding the nose cone on.
Try removing the 4 inner and pulling the headlight assembly out of the nose cone. If this doesn't work, try removing the nose cone itself. (This, unfortunately, will mess up your paint job.)
-Dave Bauer......Pulse 167
by: Steve George
I found out that using synthetics in any engine that shares oil with the transmission you have to be aware that there is sufficient lubrication for the engine AND there is sufficient "shear" for the clutch (wet clutch).
This is what provides some of the drive friction for the clutch, if the shear is unsufficient (too slippery) you wont be able to take off! The clutch will not grab sufficiently and you could burn up your clutch, BTW I upgraded my clutch with a SIMPSON HD racing clutch that was made for using synthetic oils.
by: Don Muddiman
Just make sure you run a motorcycle synthetic they are designed for wet clutch systems. I have choosen to try the Amsoil 20/50 motorcycle oil in my 400cc Yamaha after I have completed testing the standard oil.
So far, test with my oil cooling system worked excellent. It was in the mid 80's and I never turned the cooling fan on even running in heavy traffic. The highest the oil temperature ever peaked was 250 degrees and the engine was still running great. The typical oil temparature was around 210 to 230 degrees. Cool down from 250 to typical took about 5 minutes at 45mph.
by: Don Muddiman
If I had the same setup as in your Pulse I would use the AMSOIL SAE 10W-40 HIGH PERFORMANCE SYNTHETIC MOTORCYCLE ENGINE OIL or a equivalent synthetic motorcycle oil. Using an automobile synthetic could create clutch slippage problems. Using the synthetic would help lower the engine temperature (30 to 50 degrees) and help reduce engine wear. But just remember when your low on oil do not mix standard oils with the synthetic oil.
A few years ago, I bought a very nice bright LED electronic speedometer from JC Whitney. I had it in my truck for a long time. It used 4 magnets wired to the driveshaft and a magnetic sensor. It was calibrated by following another car at a known speed and adjusting a knob on the back. Maybe they still offer it. The problem would be finding a place to mount the magnets on a pulse.
I found a repair manual for the 400cc Yamaha engine in my Pulse #61. The manual is for a 1976-1981 Yamaha motorcycle. It looks like the speedometer gear located down on the front wheel of my Pulse is the same one that came on a 1976-1981 Yamaha XS360 and XS400 motorcycle. This suggests you may get a replacement from a Yamaha dealer or motorcycle salvage yard. You probably will have to use the worm gear from your Litestar/Pulse to maintain the proper speed ratio. It is very easy to change.
Below is the dash of the BD200.
I used a small LED out of an old computer I took apart. I used electrical shrink wrap to attach the LED to a flexible tube and aimed it at the speedo. It works great. The nice thing about the bicycle speedo is that it can be calibrated for any size tire.
I have pulse 195, the keys were lost by the previous owner, well I found the exact replacement for the ignition switch, down to the knurled nut on the dash, at "Wal-Mart". The part number is UN12140. It is called Universal Ignition Switch. Manufacturer NIEHOFF. Distributer is BWD Automotive, I believe to be Borge-Warner.
Litestar of Texas postcard
These vehicles run on Regular gas....Check engine manual for exact type to be used.
I have seen claims from 80 to 100 MPG with the 400 Powerplant. I have the 1100 Goldwing and expect to get around 45MPG (on an average). As with any vehicle, it really depends on your driving habits, driving conditions (local or highway), and how well your motor is tuned.
Don Muddiman questions.......
The best solution for a fuel tank is to have a local welding shop or fabrication shop to construct you an aluminum water tank. Most shops will not make fuel tanks and if they do it will cost you and arm and a leg. The shops are liable for the fuel tank(s)and if you request a water tank and fill it with fuel it's your problem. Just make sure the tank is pressure tested to the same standards as a water tank. You may want to add baffle to the inside of the tank. My first custom aluminum 3.5-gallon fuel tank for the Pulse cost me $85.00. Since then I have installed a 10-gallon fuel tank that cost $125. Don't even think of putting a plastic fuel tank in your Pulse.
I am working on pulse #218 and what Bob described is exactly what happened to me when I chased Chuck and Linda's Goldwing powered Pulses up to the big auction after the 2002 Pulse Convention. Unfortunately, my Pulse would no longer make enough power to drive home! Sadly, I had to load it on a trailer to get home. I found out (as Don suggested) that one of the primary ignition coils in the engine had gone bad. I got a replacement set from a junkyard in Colorado (the coils are no longer available from Yamaha) and was back in bussiness. The Pulse ran fine for about a year.
In the mean time I enjoyed taking the Pulse 1200 miles (round trip) to Oshkosh, WI for the EAA Annual Convention. Listening to the truckers on the CB and talking to people at the gas stations was a lot of fun, but the average 45 min gas stop (answering questions) every 100 miles made the trip 16 hours one way. I should have replaced the tires before going... Changing a flat front tire beside the interstate is no fun! The tread pattern on the new tire made the pulse pull to the left baddly! My arms were really cramped after the last 200 miles. The 2003 Pulse convention was three weeks away and I rushed to find new tires. I finally had the Pulse ready to go and just installed the new tires at Midnight before the convention... I lowered the Jack and the Front tire went flat! ARGH!!! It leaked around the rim, I had it fixed Monday, but missed the convention...
As I said earlier the Pulse ran fine for about a year... October, hot day in stop and go traffic.... Pulse started to run bad.... Switched on all the fans and babbied it back to the garage. Tried driving a week later on a nice evening 70 deg. Ran great for about 20 miles. It started running bad, losing power, I turned on the fans. It ran a little better, but it popped and cracked and carried on in the mid rpm bands. It would crackle but run at high RPM, but if I slowed down; I was luckly to keep it running. I checked the primary coils when I got back and sure enough, one of them checks bad again.
I thought about replacing the coils again, but this is not a permanent solution.
MY Yamaha 400
Value and Insurance
Value and Insurance
Pulse #241 needed a complete new frame in 2021
The owner installed a new square tube frame in 2022 Last Update: 11-20-20......
because it had been left outside for years.
Your Host, Steve Schmidt
Pulse #241 needed a complete new frame in 2021
The owner installed a new square tube frame in 2022
Last Update: 11-20-20......
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