idle speed thread.

[dannylightning]

after a discussion about idle speed in one of my post a few weeks ago that was originally started about something else but idle speed got brought up i leaned one important thing. if you have your one cylinder bike set to idle low idle it will put a lot of extra strain on the motor witch is no good at all. that is some important info for any one who does not know that.. i did not!! the manual calls for right around 1200 rpm idle sped but with no tachometer its a bit hard to judge

i do have one more question about the idle speed on this bike, if the idle speed is set higher will it increase performance and how soon your bike runs out of torque between each gear. here is a video of how my idle speed is set now, at this speed it seems to preform much, much better

[youtube:1d6rylul]http://www.youtube.com/watch?v=-gmcHctVFiY[/youtube:1d6rylul].

this sounds a little fast to me but i notice much better acceleration with the idle around this speed so i think it will keep it right where it is, when i had the idle set at a lower speed (not all that much lower) it would seem to run out of juice/torque in each gear a lot sooner and when it seemed to want to run out of juice/torque (not want to go any faster in that gear) if i gave it a little more throttle it would hit he power band for a split second and than i would halve to shift. (that was driving at normal speed). now at normal speed it seems to have more acceleration and torque, i do not halve to shift as soon. first gear would run out of torque right around 10 miles per hour. second would run out right around 20 miles per hours. basically every 10 miles per hour i would have to shift but not any more

when trying to speed up as fast as possible i noticed now my shift points are much further apart. it seemed to gain a additional 7-10 mph in each gear before i would halve to shift for example i pushed 2nd gear up to just over 30 mph compared to the lower idle speed i would halve to shift into 3rd right at 20 miles per hour. i pushed 3rd gear to over 40mph when before i had to shift out of 3rd right about 30 mph..


i never thought idle speed would make much difference in performance but it did on my bike. i am wondering if i am just crazy or if any one else had had a similar experience. i was kind of disappointed with the bike cus i thought it was a bit slow (besides that i love the bike), now it feels quite fast after only adjusting the idle.

[JWR]

Best shift points
1st....20
2nd...30
4th....40
5th....50


MAX SPEED
1st....25
2nd...45
3rd....60
4th....70+
5th....??????

YMMV

Jerry

[Water Warrior 2]

Sounds like a decent idle speed. The idle speed has no real bearing on the shift points. Increasing the idle is the same as opening the throttle a bit and leaving it there. Maybe you are just learning to wind it up a bit more before shifting and reaping the rewards.

[alantf]

Sounds fine to me too. Mine is, if anything, slightly faster. I find that the "slightly faster" stops that annoying jerk when I shut the throttle quickly.

Note :- Comments regarding "annoying jerks" should be posted under "humour" (LOL)

[dannylightning]

Originally Posted by Water Warrior

Sounds like a decent idle speed. The idle speed has no real bearing on the shift points. Increasing the idle is the same as opening the throttle a bit and leaving it there. Maybe you are just learning to wind it up a bit more before shifting and reaping the rewards.

I have known how to shift for a long time.. let me word this a bit different. i could feel it running out of torque every 10 miles per hour, what i ment by that is the bike would stop accelerating but he rpm's kept going up than if i gave it a little more throttle it would start accelerating again. right after i adjusted the idle it accelerates all the way through to the higher rpms with out running out of torque..

i did replace my old air filter witch looked pretty bad. half of it was covered in fluid and it smelled like gas it was nice and dirty too. i ordered a new one and put it in the other day.. been raining so i hadent really rode the bike. i had to readjust my idle after i stuck the new filter in there but i did not bother with that till today, so i was thinking i just adjusted my idle and its hauling ass not really thinking about the air filter i just changed out a few days ago witch could have caused this improvement. but......

i know nothing about a carborater or how they work besides it opens the flap and dumps gas in the hole. common sence tells me that it shouldn't have had any thing to do with it running better. but since i know nothing about them and i adjusted it and it did run better so i had to find out for sure, and now when i think about the worn out air filter being replaced and the bike preforming much makes way more sense.

it is important NOT to have a low idle on a single cylinder or you can damage your engine since it puts extra strain on it. that is why i titled this engine idle thread. the best and max shift points were stated witch is good to know also. so even if the part about the bike preforming better on a higher idle speed is not correct at least there is some good info in the thread..

[GZ250]

the idle speed seems just the same as i have and i thick if you use tachometer you will find that it is still lower than recommended because when i first bought the bike the guy who handed over the bike to me and did a trial run adjusted the idle way up and told me to keep it to that position and bike made a lot of noise, i brought it backk to lower after sometime. Now again when i went for valve adjustment (the other dealership) they increased the idle speed. i dont understand why they do that - as you said better for GZs engine health or better for increased performance. but if idle is very low you will definitely have issues with accleration and pick up from a stop. so ideal idle is a critical point and may be different for each bike.

[GZ250]

Originally Posted by JWR

Best shift points
1st....20
2nd...30
4th....40
5th....50


MAX SPEED
1st....25
2nd...45
3rd....60
4th....70+
5th....??????

YMMV

Jerry

if you shift 4th at 70mph aren't you going to put TOO much load on GZs engine that could blow up or make a leak in the head gaskit or some other gaskit. maximum i go in the 4th is 50 and shift to 5th. and hardly touch 70mph. maximum for me is 65mph. i better change the bike if i need speed. actually i follow the best shifts points you mentioned. also depends how heavy is the load sitting on the bike, i am already heavy and big for the GZ.

[JWR]

if you shift 4th at 70mph aren't you going to put TOO much load on GZs engine that could blow up or make a leak in the head gaskit or some other gaskit.


If and when it blows up I'll let you know.
When climbing a hill I will downshift to 4th and run WOT to keep my speed up.

[Water Warrior 2]

Originally Posted by dannylightning

i had to readjust my idle after i stuck the new filter in there but i did not bother with that till today, so i was thinking i just adjusted my idle and its hauling ass not really thinking about the air filter i just changed out a few days ago witch could have caused this improvement.

A new air filter could make all the difference in the performance increase.

[dannylightning]

Originally Posted by JWR

if you shift 4th at 70mph aren't you going to put TOO much load on GZs engine that could blow up or make a leak in the head gaskit or some other gaskit.


If and when it blows up I'll let you know.
When climbing a hill I will downshift to 4th and run WOT to keep my speed up.

well i had my gz going 50 in 3rd gear..