my stock bike toped out 51km\h!!!

[damo99]

i'd like to know how most people measure there speed.i think you'll find that if you used a gps your speeds will be alot lower.
i have 4 motored bikes the only one that gets over 40klms is my new cruiser with a gt-5 high comp head, nkg -bp6hs plug, sbp expansion chamber , boost bottle(all it does is help idle),speed carby and sbp shift kit (34-14)7 speed. on flat ground in 6th (16tooth)gear top speed 63klms.
my friend who has a 66 (z box)keeps telling me he gets 55klms on a 44 tooth rear sproket . so i got my gps took it for a ride -top speed 35klms (just).
i used to think i was going a lot faster with one of the bike computors set up by the instructions and it said i was doing over 50klms when i wasn't .
theres to many vairiables setting up the bike computor ,you might have 26 inch wheels and insructions say set at a scale of 200 but it all depends where on the spokes you put the magnet . 1 cm up or down can be a big diffrence to your speed. also it also depends on the distance between the magnet and pickup .if your wheel has a very slight buckle this will affect the pickup giving a wrong reading
this is just food for thought

 

[shell shock]

whoa... not to be a bummer, but my stock bike tops out at 50 km/h. i might want to re-check things on your bike

 

[damo99]

not a bummer but how did you measure your speed
as i said before the only realy accurate way is by gps
even a car sitting next to you isn't accurate

 

[shell shock]

twas on a gps. mind you that was last season. shes been beat since then, as well as put on a heavier bike. she now tops around 45km/h. ****... lol hows progress on your end?

 

[adrian101]

okay update

53km on the straight flat

spec:
26" coaster bike
F80b engine
Speed caby
Stock plug
Stock muffler
32:1 oil to fuel mix
44t sprocket
and i weight 112kgs lol

What i have coming in the mail: expansion chamber, after market bullet head, NGK wires and plugs, a new and not bent 36t sprocket, "nos kit" which i will not use but it's for show

 

[shell shock]

you might want to re-think the coaster brake... sides that, nice and simple. man you have to update us when you get all your accessories in!

 

[adrian101]

you might want to re-think the coaster brake... sides that, nice and simple. man you have to update us when you get all your accessories in!

For the coaster brakes, i took it off and the back rim, i got a simple 26" mountain bike back rim, I took the mountain bike cogs/cassettes off the back rim and replaced them with a freewheel one piece cog.

I put V brakes on the bike to replace the coaster.

Reason for taking the coaster brakes off, I have a bad habit of peddling backwards when on motorized bikes. Them brakes prevented me from that habit so i had to in stall a freewheel fixie lol

 

[shell shock]

there we go, thats the way to do it!

(ps, 100th post... WOOO!!! this is cause for celebration *raises a glass of locktite*... er maybe not.. XP)