Those are the easy bits to tinker with once it is running if it proves necessary should the handling need fettled.
E: Engine Comet Mongrel
- Thread starter Cyborg
- Start date
One more question about your Monster if I may.... Presumably it has that interesting little fuel pump. Does it pull vacuum pulses from both intakes or just one? I'm trying to determine it's volume if it is hooked up to the Comet intake. I'm sure it would be plenty either way. That little guy seems to be able to move a lot of fuel for what it is. If you have to dig to get that answer, then please don't. I'll find a manual somewhere.
Still not apparent without further dismantling but seems to be only one vacuum connection.
Thank you. It seems there would likely be just the one connection, but you never know. Until I dragged the Monster frame out of that dumpster, I wasn't aware that they used a vacuum pump. I don't have a tank yet, just a plug for the mold, so not sure about fuel capacity. Some of the fuel may end up below the float bowl, so the vacuum pump is a easy way to solve that.
Neither was I until you asked the question, the trouble with"modern" bikes is that you quickly become used to treating them as turn key items like modern cars..Having had a poke around ,apart from the fuel level sensor in the tank and an inline filter there is another mysterious component in the fuel line under the tank?.
Probably the vacuum fuel tap if it is connected to the same components. When I first saw that pump from a distance, I thought it was an over engineered reed valve assembly, but as I got closer, it was obviously too big for that. Previously I've only seen them (much smaller) on chain saws and outboard motors. If you didn't know it was there, then that speaks to the reliability. I can't recall the exact volume that they will push, but it's quite high.
Good guess, certainly a small neat valve, the vacuum pump could have been a good option for the trouble many owners had with the fuel system on the SZRs , many resorted to separate electric pumps to feed the pair of carbs on the 660 5 valve motors.
Just out of interest, what plan for ignition system and carb ?, have spoken to several single cylinder racers who swear by the stuff made by Ignithch in CZ. Have just bought a couple of the cheap Keihin PWKs( 38 and 40mm),on Ebay and the quality seems very good. Time will tell if they work well but worth a try at £35. delivered.
I bought a ignition system from PowerArc, and adapted it into a Lucas distributor from an Atlas. As for the carb, I haven't decided yet. I have a TT that I could use, but will likely buy something new that makes slogging through stop and go traffic a little easier. I was thinking a Mikuni round slide and try a UFO. Haven't considered the Keihin.... let me know how it goes please. Still flying a flag of convenience and keeping the bride happy, but should be back in the shop soon. Have the bits to fix the brakes, tires, clip-ons etc. waiting for me when I return. I'll post a couple of pictures of the internal disc brakes. I don't think any were imported into the US. They are IMHO an interesting setup and got more of a bad rap that they deserve.