Razor e300 ultra. Technical guide

Lightweight / Folding / Portable EVs - seats optional
Ianhill   1 MW

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Feb 18 2019 7:01pm

ElectricGod wrote:
Feb 13 2019 10:34pm
For dual wheel drive, get the dual VESC 6.6. You have to program each one individually, but the dual is cheaper than 2 separate VESC 6.6's. They come in 100 and 200 amp versions with a max of 60v.
If this was 20s with the same current handling then it would sell in massive quantity, I can't fault the single 60amp version it works well but really I would say the software development has been the hard work the fact that copies are allowed to use it for that i give respect to the author Benjamin he must be a top guy.

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ElectricGod   100 MW

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Re: Razor e300 ultra. Technical guide

Post by ElectricGod » Jun 07 2019 10:28am

Ianhill wrote:
Feb 18 2019 7:01pm
ElectricGod wrote:
Feb 13 2019 10:34pm
For dual wheel drive, get the dual VESC 6.6. You have to program each one individually, but the dual is cheaper than 2 separate VESC 6.6's. They come in 100 and 200 amp versions with a max of 60v.
If this was 20s with the same current handling then it would sell in massive quantity, I can't fault the single 60amp version it works well but really I would say the software development has been the hard work the fact that copies are allowed to use it for that i give respect to the author Benjamin he must be a top guy.
I know...flipsky didn't go far enough IMHO...they really ought to make a 100v max version. I bet with a little bit of effort, that the controller can be modded for 100v. I'd have to buy one, but I bet the onboard DC-DC converter can be reworked for more voltage. Replacing the caps and mosfets for 100v ones isn't really hard.

Oh well...their loss!

I know of 3 VESC based projects that are close to completion that are 100v or 150v. The one that really has my attention is running TO-247's and 150v in 12 fets...should do 15kw or more.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Jun 11 2019 6:35pm

A200s vesc does 16s reliable and can be sourced for £300 3 week back order and does 12kw max could be a good contender for blasting a small scooter about but there are few you mentioned that could have easy route to upgrade so they are interesting to say the least.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 15 2019 7:33pm

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This build stalled for quite some time I've been trying to find a suitable fork that is not to heavy but has the correct width, so I chopped the original fork up and centred the new front wheel with disc attached to give me the correct width I needed and the dropout happened to match that of a fatbike fork, 135mm chuffed with that I measured the hell out of that front hub to get it spot on and it looks like the industry agrees 135mm small as u go on this width of tyre.

Due to the the handle bars being upgraded to SCS clamp, I no longer need a threaded steerer this was also a concern stoping me modding the original fork so I kept it in my mind and found a 26 inch fatbike fork with a threadless steerer that was 15mm to longer so I have the option of upgrading the bottom bearing from 1 1/8th to 1.5 and use a cup and fork convertor for a tapered steerer this will give me added strength around the bottom bearing but I'll have to check first as it will push the front of the scooter up a little by the height of the bearing cup adapter so I may run a 1 1/8th I 'll have to suck it and see on this one I want to keep the scooter low and compact don't want it looking lanky and strength is fairly decent even with out the added bearing gurth 1 1/8th is good enough for the fat bike.

Then to finish the job proper all I need to do is shorten the legs on the steel yellow set of forks with the greys lower tabs, add a disc brake hanger and powder coat black, so it's easy enough no major weaking or invasive cutting happening, the original forks even though useless and for the scrap bin have served well as a template, I wouldn't have spotted the similarity with out doing a crude mock up.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 20 2019 4:47pm

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Got my fork today well happy turns out to be just what i needed much more heavy duty and it has a a little bit of forward rake should be abit less turn responsive but more stable at speed which is ideal for such a small wheel that is light I will have no issues with turn in a wee bit of weight will help to keep pin point control.

I've been taking measurements for the frame and brainstorming on paper while looking at frames for the design and look I going for the drawing don't cross over to well and ain't to scale I ain't no artist but it's to help me picture it all on my head and imagine clearance issues I may have and how I'll go about making the frame itself in going to reuse the fork after all as the outrigger legs to add strength to the headtube simular to the new boosted scooter.
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Ianhill   1 MW

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 21 2019 11:50am

Been checking through my tyres to make sure I have clearance and marking the fork ready to be cut as u can see it's going to be a thick beast compared to the stock fork.
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I measured the razors headtube and it's 110mm there's lots of versions of the scooter over the years and this measurement drops on some to 100mm to save metal scabby bastards shorten the bearing race distance and stability so ive found a 130mm steel headtube and I'm going to use that i hsve a long enough steerer tube it will help make my bars feel stiff, by the end of it I'll of chucked most the razor out used none if it's parts and cut it to bits as a template :)

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 22 2019 6:39pm

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Came across this dirt scooter while looking at differing forks and really liked how the axle is attached with no tabs welded on so ive gone with that only got to weld up the disc brake attachment.
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I've spotted that carbon forks use a compression plug rather than a star nut, with the scs compression system I think this will be the finishing touch to a strong front end but I'm gonna have to dig about for the correct one I need.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 23 2019 4:35pm

Works a treat just need to get some 12mm id tube to make the bearing spacer in the hub and the exterior spacers, I can move in to the frame now.
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Ianhill   1 MW

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Sep 25 2019 5:11pm

Cut the disc hanger of the old fat fork and test fitted, the brake aligns up nicely quick sanding and remove old cable hanger and it's ready to be welded up along with the washers on the axle to create the tang so the axle has good strength to the fork.
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I must of spent 10 hours designing a frame that's as compact and strong as I can make it with an active cooling channel underneath that's protected from direct hits, The controller can be sealed from the elements in the battery box but cooled with heatpipes same for the bms both will be stacked close together.

I'm finalizing the design on paper and I'll get some pics up of what I intend on, I've designed the scooter to use my existing batterys and also 16s6p or 102 21700 cells, a Bluetooth 12 fet controller and 24s 100amp bluetooth bms so i can seal the lid and external charge there will be a dc breaker on the bms but that will need the lid removed if tripped so I'm going to choose this one carefully for what I will require, 120v 60amp single pole more than likely

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Re: Razor e300 ultra. Technical guide

Post by cheapcookie » Oct 07 2019 10:43pm

what axle length and size front and rear? I have two scooter hub motors sitting but its the small ones

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Oct 07 2019 11:10pm

135mm front dropout 150mm minimum on the rear with the hub I'm using but it needs torque arms so the axle width is 235mm I'll trim it down to around 210mm I imaging when it's done giving 30mm each side for torque arm that attaches to frame plus a nut and washer (15mm)

I've got a bigger fatbike fork that's 150mm with a tapered steerer and a matching headtube but it's a build for the future I'm finishing this one soon as I got time progress is being made be it slow hopefully before Xmas I'll get a grip on it.

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Re: Razor e300 ultra. Technical guide

Post by ESR_RSE » Oct 09 2019 5:44pm

So taking a razor and making it into the Go Ped ESR.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Oct 09 2019 7:12pm

Smaller in length bit more cleaner handlebars but simular weight and stance.
Toying with a drift trike build then nice light small alu one.

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Re: Razor e300 ultra. Technical guide

Post by Ianhill » Oct 09 2019 7:27pm

cheapcookie wrote:
Oct 07 2019 10:43pm
what axle length and size front and rear? I have two scooter hub motors sitting but its the small ones
Stock razor front fork uses a 125mm dropout with the 3.00 tyre and 115mm with the 2.50 all the frames I've seen have had a 140mm rear dropout no matter the ture size and there's upto version number 35 in the UK so there's lots that can catch out little differences in headtube length, handlebars fold on early models but not on later ones, I find the latest version is best overall from stock but any dark grey version would do for a taredown they all have the same frame, just different fork and bar lengths.

Like I've worked on the assembly line I've been in so many of them.

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