Triumphrat

Bbogie

While doing other work to my 98 Adventurer with 25,000 miles on it, I rejetted the carbs for the altitude here. I went from the stock 98 to 92.5 and 1 3/4 turns on the standard pilots. It had been running rich with very black exhausts and black plugs. Additionally it has TORs but with some baffles in the pipes. I also replaced the filter with a new K&N. Otherwise standard. It seems to run well, idles well, plenty of power. But, I have noticed that with 100 miles on it the pipes are bluing a lot more. So far, down to the screws, but very dark blue at the engine. I'm worrying about burning valves. Should I go to a 95 jet or back to a 98 before I damage the valves?

Also is there any way to test if the temp light is working and the fan is operational? Neither has ever come on, but I've only ridden this thing 250 miles in the cool weather since I bought it. It's mostly just been a project. I'm ready for that part to end. I'm not looking for maximaum performance, just decent performance economy and reliability. I'm too old to heal fast anymore.

Thanks, I appreciate any input.
Joe

patrol21

The K/N is going to let more into the carbs as it's surface area is much larger than the stock filter. I agree you were running a bit rich but I think you went too far with reducing the main jet....if your getting noticable blueing quickly, you are most likely running too lean, although a small amount of blueing is not unusal but if it occurs more than 6 or so inches from the heads, it's an issue.. I would cut it in the middle and start with the 95 on the main. Also, check your float heights while your there....to really see how your running, have your carbs checked if you don't have a set of gauges. Then you'll know for sure. Good luck.

__________________
The worst day riding beats the best day at work....no exceptions.

jimmyj900

I'd try a #95 and see if the bluing continues to spread. What's the altitude there and I'll calculate what jet would be appropriate?


The temp light sensor is located on the left of the engine just behind the water pipe. You can test the light circuit by connecting a jumper wire to the sensor wire and shorting it to ground. That will turn on the temp light if it's working properly.

To test the sensor you need to measure the resistance. It's either 5000 or 10000 ohms (don't remember which) when cold and under 100 ohms if you dip it in boiling water.

To test the fan, disconnect the plug from the fan switch (located on the right side of the coolant reservoir under the fuel tank) and short across the contacts in the connector. That should start the fan running. If it doesn't run, check for gravel/leaves, etc. inside the fan shroud.

To test the fan switch you need to check the resistance cold (infinity) and when hot (dipped in boiling water). When hot the resistance should be about zero.

Jim

__________________
Note: This post may have been altered without the knowledge or consent of the author.

http://s279.photobucket.com/albums/k...0Head%20Stuff/

Bbogie

Thanks, Patrol21 and Jim. I'll probably get good at pulling the carbs before this is over. Jim, the elevation is about 6000 feet where I live and I commute to about 7000. I'll run the checks on the fan, switch and sender. I can see that I'm going to want to install a temp gauge. The idiot lights just aren't enough information. You fellas have apparently been working on these machines for some time.

Bbogie

.

Patrol21,
I did set the float heights when I opened up the bowls. I have to confess my ignorance as to what type of gauges you're referring to. Would any shop have them? Thanks, again.
joe