Hi folks,
Beginning of winter I picked up an `04 Viper ER. Found that it was constantly fouling plugs and not running right so I took it into a local shop to have it serviced. The mechanic found that the carbs were almost spotlessly clean but the power valves were gunked up badly. With this fixed the sled ran fine, for awhile.
If I come to a stop after riding for a bit, engine has been warmed up well by this point, and turn the sled off, it will not start right back up. I end up cranking it for a few seconds and giving it a little throttle. This will bring the engine to life. Now if I let the sled sit for about an hour or so it will start right up when I hit the key, no cranking at all. This problem has been getting progressively worse. This also causes me to go thru plugs quicker than what I think I should. Almost to the point where I could put a new set in after every couple rides of 50-60 miles.
Also I have to let it warm up for about 5-7 min or more(probably closer to 10 minutes) before I can move the sled without fouling the plugs. If I try to move the sled it will just bog and dump injection oil, thus fouling the plugs.
I have never had any experience with the viper, nor really any Yamaha sled except for the 70's Enticer 250 we had a long time ago.
It sounds to me like the engine is loading up but I may be wrong, any ideas or advice for me?
BTW, I am running Amsoil Interceptor if this helps the diagnosis any.
Thanks,
Nate
Beginning of winter I picked up an `04 Viper ER. Found that it was constantly fouling plugs and not running right so I took it into a local shop to have it serviced. The mechanic found that the carbs were almost spotlessly clean but the power valves were gunked up badly. With this fixed the sled ran fine, for awhile.
If I come to a stop after riding for a bit, engine has been warmed up well by this point, and turn the sled off, it will not start right back up. I end up cranking it for a few seconds and giving it a little throttle. This will bring the engine to life. Now if I let the sled sit for about an hour or so it will start right up when I hit the key, no cranking at all. This problem has been getting progressively worse. This also causes me to go thru plugs quicker than what I think I should. Almost to the point where I could put a new set in after every couple rides of 50-60 miles.
Also I have to let it warm up for about 5-7 min or more(probably closer to 10 minutes) before I can move the sled without fouling the plugs. If I try to move the sled it will just bog and dump injection oil, thus fouling the plugs.
I have never had any experience with the viper, nor really any Yamaha sled except for the 70's Enticer 250 we had a long time ago.
It sounds to me like the engine is loading up but I may be wrong, any ideas or advice for me?
BTW, I am running Amsoil Interceptor if this helps the diagnosis any.
Thanks,
Nate
xsivhp
Active member
How much oil are you using in 100 or 200 miles? Mine starts hard after I ride and stop and let it sit a bit - buddy told me it's more than likely the needle and seat so I ordered them Monday, unfortunately I won't know if it is it or not for a while.
To start a Yamaha triple when its warm you need to crack the throttle 1/8-1/4 or it will be a bitch. As for too much oil, make sure everything is together properly where the two halves of the oil cable join. If not seated in the boot properly it will cause excessive oil consumption.
Thanks for the information guys,
So my starting problem is normal, that's good to hear. What about the length of time it takes to warm up, is this normal?
I can't really give you an answer on how much oil I use in 100-200 miles. I usually top it off every time I go out and usually my average trip is about 50-60 miles. Next time I go out I will pay better attention.
The sled only has about 4000 miles on it but I do know the previous owner wasn't the best on maintenance and tried running it on conventional castrol oil (power valves were almost to the point of pulling a cable thru).
Thanks again.
So my starting problem is normal, that's good to hear. What about the length of time it takes to warm up, is this normal?
I can't really give you an answer on how much oil I use in 100-200 miles. I usually top it off every time I go out and usually my average trip is about 50-60 miles. Next time I go out I will pay better attention.
The sled only has about 4000 miles on it but I do know the previous owner wasn't the best on maintenance and tried running it on conventional castrol oil (power valves were almost to the point of pulling a cable thru).
Thanks again.
daman
New member
Check your jetting and oil usage,you sound rich,your using the right oil tho. 
xsivhp
Active member
My sled is hard to start even cracking the throttle. Not the normal crack the throttle fix, so I hope the needle/seats fix it up.
Thumper1
New member
i don't even bother holding it open slightly, i just hold it wide open when i start it. takes the guess work out of it.
btw, a full oil reservoir on a viper should be good for at least 600 miles. when i go on a week trip to WI, i don't even bother bringing oil.
btw, a full oil reservoir on a viper should be good for at least 600 miles. when i go on a week trip to WI, i don't even bother bringing oil.