New Build crystalyte 4080 / 3580 down hill bike UK

[Rix]

Just watched your video, your ride came out every well. I like the close up shots. Your dropout are tits. Looking forward to seeing some riding when your weather permits.

Rick

 

[topfuel]

Weather a bit better so been out for a ride of about 10 miles , nice to get back out on the Hornet i Hit some ice but kept it upright , also hit 40 mph plenty left in the tank .
Bike is going well

 

[litespeed]

Most Excellent!

Tom

 

[Rix]

Your bike build continues to impress me. Glad the weather allowed for a ride. Its starting to warm up here as well. It has been consistantly above freezing during the day time for the last week. Its funny because it has been so cold for so long that at 36F (3C) on a bright sunny day I was outside with shorts and took the Bomber for a run around the block. I did get cold from the wind chill but as soon as I stopped, started warming up again. Now I know why people in Northern alaska think its hot when it gets to 40F. Compared to the negative 40-60F they see up there during the winter, 40F would be a scorcher.

Rick

 

[topfuel]

StILL VERY COLD AND WET here in the UK , i have had to change the main battery connector which crystalyte fitted as it was arking and i think this could off caused my bike to cut out under power , i have now fitted a 50amp Anderson connector which looks twice the size of the old one , but not tested the hornet yet

 

[Rix]

Don't feel bad about the weather, it was a snow blizzard here yesterday. Tired of this and ready for spring. Got the 5404 on the bomber now, much more torque than the 5403. Hopefully your acring problem is solved. Cant wait to see the hornet in action.

Rick

 

[topfuel]

we may have some of your snow here again soon :x we need some dry weather to get out and test some more , my mate has a suitable camera to mount to the hornet so as soon as i get some onboard footage i will post it

 

[topfuel]

The Bike has been cutting out again once the battery drops below 79v at full throttle , been in touch with kenny again regarding this matter as he supplyed it as a whole kit , i let the battery run down to 74 volts and the bike cut out for 15 min and would not restart so i removed the battery and did some tests , ie not voltage on the charge port or the dicharge port and after 15min it all correct again at 74 volts , i know think it is the BMS cutting the battery off , so i am now testing it without the bms while riding , first test seems very good no cut out at 74 volts , aslo hit 45 mph today easy
i will get it sortted soon

 

[Rix]

What is your batteries C rate? Some of the Lifepo4 coming out of china are cheap but they are only 2-3C.

Rick

 

[topfuel]

Battery Specification Battery spec came today :lol:
Model: 7220
1. Specs summarization
Item Index Remarks
model 7220 V＆C
capacity 20Ah at 0.5C
rating voltage 72V 83.5V-60V
weight 12kg ——
internal resistance ≤300mΩ
AC impedance
value
size
long 200mm Could be
designed for
request
wide 180mm
high 170mm
charge
normal current 3A
max current 5A CC＆CV
upper limit voltage 84V
discharge
normal current 50A Could be
designed for
request
max current 200A
lower limit voltage 60V
working
temperature
charge 0℃～45℃
——
discharge -20℃～55℃
keep capacity ≥95%/month ——
cycle life ≥800times ——
BMS
overcharge protect voltage 4.2V±0.03V
——
over discharge protect voltage 2.8±0.1V
over current 200A±20A
over current protect delayed 15ms
protect function OK
package bag ——

 

[Rix]

So reading your data, your pack has the potential for 10C output. Should handle 60amps just fine or 3C. Must be some kind of Headway type cells that comprise the pack. Build looks good. So, How do you like the handeling with the batts on the fork? Not a big deal right, just a tad slower turning? How is it on the woops?

Rick

 

[topfuel]

My Battery pack is working well now with the bms disconnected , kenny is sendind a new one to me , regarding the handling with the battery fitted to the front , i find the steering very positive plus i like the way the bike still looks like a bike :lol:

 

[Rix]

My Battery pack is working well now with the bms disconnected , kenny is sendind a new one to me , regarding the handling with the battery fitted to the front , i find the steering very positive plus i like the way the bike still looks like a bike :lol:

Glad to hear it, I am going to tell Trackman about your bike setup. He is having a hard time keeping his front wheel on the ground at take off with his new 4065. Maybe he should put his battery up front like yours to counter that a little. Mind if I refer him to contact you?

 

[topfuel]

My Battery pack is working well now with the bms disconnected , kenny is sendind a new one to me , regarding the handling with the battery fitted to the front , i find the steering very positive plus i like the way the bike still looks like a bike :lol:

Glad to hear it, I am going to tell Trackman about your bike setup. He is having a hard time keeping his front wheel on the ground at take off with his new 4065. Maybe he should put his battery up front like yours to counter that a little. Mind if I refer him to contact you?

yes no problem may be he should add some weight to the front to test it out first , but it will depend on where the battery is fitted at the moment
by fitting it to the front can only help really

 

[deecanio]

Topfuel,

Bike is looking really nice, have been chatting with idontwanttopedal on pm's he mentions a possible UK meet this summer if your interested, possibly at Jozzers Brighton, let us know if your interested.

D

 

[sacko]

Id possibly be up for that, depending on the current state of the Greyborg.

 

[topfuel]

Topfuel,

Bike is looking really nice, have been chatting with idontwanttopedal on pm's he mentions a possible UK meet this summer if your interested, possibly at Jozzers Brighton, let us know if your interested.

D

maybe , but its a bit of a way to go for me keep me up dated please

 

[Rix]

Topfuel, Just want to applaud you again on your super neat and clean build. I frequent your build forum often because its guys like you and Trackman with home builds that inspire me to increase my knowledge/ So, any vids yet?

Rick

 

[topfuel]

New BMS has arrived from kenny which i have now fitted , but again freezing wheather has stopped me testing and the snow looks like its hear for another week or so, could do with one of these :lol:

 

[Rix]

Sweet hummer man. That should do it.

Rick

 

[beast775]

Great build! 8) .excellent battery tray.

 

[Rix]

I spent all my money on bicycles women and beer the rest i just wasted.

Beast775, this is true, but we still have beer to get us through those low times.

Rick

 

[topfuel]

Had some sun and some FUN on my bike as its running very well now , haveing problems uploading video :x
going 40 to 45 MPH every time i go out on it :lol: had 2 cars follow me and ask about the bike

 

[Rix]

Hey TF, glad you are still posting. I like your build and it was quiet for a bit. Yah 45MPH is awesome. Can't wait to see the vid.

Rick

 

[topfuel]

i will try and do a new vid tomorrow if i can :lol: