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Post by daffey1 on Sept 27, 2014 12:07:35 GMT -5
Here's a pic of my tach This 48km ride was a much better test than the 5km round trip I was doing before. I found that the bike would cruise well at 1/4 to 1/3 throttle and run well at approx 3/4 throttle. But when I was cruising at about 1/4 to 1/3 throttle and tried a quick roll on, the motor would bogg, not rev, but if I did a slow throttle twist opening, the motor would burble and revs would increase, once on the pipe, I did not have a tach so I was going by sound and throttle position, by about 1/2 throttle, the motor would react and respond like before. It's just this transition from 1/3 throttle opening to about just over 1/2 opening that is giving me trouble. This is why I want to try a 1 size leaner needle. With the 6DH4 needle now, I only have 1 clip position left to try to lean it out. But the motor works so well before 1/4 throttle and after 1/2 throttle, I was thinking going to the 6DH3 needle in the same clip position, #2. Any thoughts anyone?
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Post by shiloh on Sept 27, 2014 12:29:01 GMT -5
You're not riding her hard enough. Lol. I know I my bikes not in the same power class as yours but, a triples a triple. Mine is now dialed in finally, and have good plug readings across the board. Mine does the same thing, use your gears and keep your revs up if you want quick response. If the revs are low in a higher gear rolling on hard will seem boggy. It took me while to realize these bikes dont respond the same as performance 4 strokes. Read your plugs in all the ranges to be sure your jetting is good, then drive her like you stole it. Cheers
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Post by Walms on Sept 27, 2014 12:34:14 GMT -5
Sounds like you could use a leaner taper on your needle.... or compensate by dropping the current needle and richer the idle screws and or bigger pilot at the same time. It helps to write everything down.
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Post by daffey1 on Sept 27, 2014 12:51:56 GMT -5
I was thinking a 1 size leaner needle aswell Walms
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Deleted Member
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Post by Deleted on Sept 28, 2014 5:47:04 GMT -5
Before I purchased anything I'd raise the needle clip and evaluate the results as Walms indicated. If there is a basic and firm issue with the mass airflow at a throttle opening range exceeding the engine capabilities it may be something you will have to learn to live with. I hope not but I have seen incorrectly sized carbs subject motors to specific flat spots-by compensating in one area but unfortunately creating issue in another.Keep up the hard work Fred as I know how much work it means for you.
rt
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Post by daffey1 on Sept 28, 2014 8:24:57 GMT -5
I'm going to raise the clip from the second position to the top position and test on the same 40km ride that i did yesterday.
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Post by daffey1 on Sept 28, 2014 10:38:28 GMT -5
Just got back from my test ride with the clip in the top position, 6DH4 needles, same as yesterday, unit worked a lot better. Was able to cruise at 1/4 throttle and motor would react pretty good on a roll on, A little sluggish, still some rome for improvement, but all in all a much better ride than yesterday. The amount of splugge at the end of the exhaust pipes is a lot less. Very little burble when cruising now. Air temperature is about 24' yesterday and today so conditions were perfect. Would like to test again when temperatures drop a little say around 15' and see how she responds, but this was the best test yet. Now have to replace a mirror that fell off during the ride and get my tach reinstalled and working, and maybe a gear indicator....... but today was a lot more fun and a lot easier to ride.Things are looking up
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Post by mraxl on Sept 28, 2014 11:22:18 GMT -5
Just got back from my test ride with the clip in the top position, 6DH4 needles, same as yesterday, unit worked a lot better. Was able to cruise at 1/4 throttle and motor would react pretty good on a roll on, A little sluggish, still some rome for improvement, but all in all a much better ride than yesterday. The amount of splugge at the end of the exhaust pipes is a lot less. Very little burble when cruising now. Air temperature is about 24' yesterday and today so conditions were perfect. Would like to test again when temperatures drop a little say around 15' and see how she responds, but this was the best test yet. Now have to replace a mirror that fell off during the ride and get my tach reinstalled and working, and maybe a gear indicator....... but today was a lot more fun and a lot easier to ride.Things are looking up If you are too rich with a 6DH4 needle you may want to consider going down one or two sizes on the needle jet. One letter size equal approx 2 needle positions.
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Post by Walms on Sept 28, 2014 11:30:17 GMT -5
I'm happy with the Veypor dash, I haven't really tried the dyno much, I think it would be better with the external trigger but I like the shift light, gear indicator and ease of visibility for speed and rpm.
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Post by Walms on Sept 28, 2014 11:32:41 GMT -5
Do you think it's sluggish because too lean or rich at 1/4 throttle? Try wicking pulling the clutch and wick the throttle at this point to see if a lean hesitation happens.
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Post by JA-Moo on Sept 28, 2014 12:58:17 GMT -5
I think a bit more description is needed, at what rpm are you rolling it on? 500's are pipey from the factory, and just don't like a big roll-on out of the powerband. They just go flat.
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Post by Curtis on Sept 28, 2014 17:09:00 GMT -5
I am just really happy the title of this thread finally got the spelling fixed....
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Post by daffey1 on Sept 29, 2014 6:17:43 GMT -5
I can't give you a RPM as I do not have a tach hooked up right now. The bogg during roll on was before the motor came on the pipe, just around 1/3 to 1/2 throttle. The bike worked much better on Sunday with the clip in the top position as compared to the test on Saturday with the clip in the 2nd position from the top. Both tests were with a 6DH4 needle. I think the bogg is a too rich related problem as not only did the bike respond better with the clip in the top position, leaner position, but the amount of splugge on the ends of the pipes was a lot less on Sunday's test. The plugs are a dry, nice light cholate brown color now. I hope my spelling is better now Curtis
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Post by Rick on Sept 29, 2014 6:18:41 GMT -5
Here's a pic of my tach This 48km ride was a much better test than the 5km round trip I was doing before. I found that the bike would cruise well at 1/4 to 1/3 throttle and run well at approx 3/4 throttle. But when I was cruising at about 1/4 to 1/3 throttle and tried a quick roll on, the motor would bogg, not rev, but if I did a slow throttle twist opening, the motor would burble and revs would increase, once on the pipe, I did not have a tach so I was going by sound and throttle position, by about 1/2 throttle, the motor would react and respond like before. It's just this transition from 1/3 throttle opening to about just over 1/2 opening that is giving me trouble. This is why I want to try a 1 size leaner needle. With the 6DH4 needle now, I only have 1 clip position left to try to lean it out. But the motor works so well before 1/4 throttle and after 1/2 throttle, I was thinking going to the 6DH3 needle in the same clip position, #2. Any thoughts anyone? What happened to it Fred?
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Post by daffey1 on Sept 29, 2014 6:22:03 GMT -5
Don't realy know. When I started it up it just fluttered between idle and 7000rpm a few times and then the needle fell off. the bike was warming up and not on the road yet. Oh well, just the way my luck goes No worries, I'm use to these sort of things..
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