Let's be on the level

15974253961966423044302091614754.jpg
15974253649026348379150175128133.jpg

<phorum break>
15974252973037181462042384248732.jpg

The geometry of these kx80 dual crown forks makes for a wheelie daily which I could do without. Unfortunately my calculations are 15" from bottom of crownsteerer to front axle. This motorcycle fork bottoms are 14" tall.. interestingly the dual.crown fork on my old downhill mountain bike are both 35 mm diameter with 28" length.

Is there a 35 mm stanchions fork diameter but with shorter legs that anyone is aware of...I'm trying not to mess with the actual triple tree because I needed the hobbit heat tube shortened for this particular one. But I guess I'd contemplate a complete new front fork...the reason the fork is apart is because the lower damper tubes aren't correctly sealing so the fork has no damping qualities. So might be easier to start over. My goal is a level bike. I'm in the process of lowering the rear shocks with a new intake from mlm if he ever makes any more 21 mm Dio ones.

Some kind of mini Moto bike fork set up I imagine.

Re: Let's be on the level

Dirty30 Dillon /

You'll be hhard-pressed to find something in the length you're looking for. I would just consider shortening the forks you have.

Re: Let's be on the level

Overpriced Parts /

Maybe treats has something you could use like this

https://www.treatland.tv/peugeot-hobbit-bravo-mbk-EBR-hydraulic-forks-p/ebr-hydro-103-26mm-445-fslash-220.htm

You could sell off your kx forks/front end and buy aftermarket ones

Re: Let's be on the level

I think I need to shorten to 2" travel.

Alternatively is some kind of Tomos front end with a disc. The entire rationale is for disc brakes. I thought it would be a relatively easy task. The seals on the oil tube with the holes is non existent. So that's why I'm contemplating alternatives.

Re: Let's be on the level

no groms no blasters /

taller shocks

Re: Let's be on the level

> no groms no blasters Wrote:

> -------------------------------------------------------

> taller shocks

But , maybe Mark isn't that tall .

Re: Let's be on the level

That's exactly the first thing that's wrong with lengthening rear shocks on a Hobbit....the rear axle is less and less planted. Too much flex... I am going back to 290 m from 330. I would go back to stock if they were sturdy and had a front

disc. The center of gravity was set by engineers. It handles better. I just want performance , level and 290 mm rear... All are non negotiable. I've tried your suggestion. Nyet comrade.

What do put bike forks and wheels look like? The hobbit requires the same diameter wheel which almost is the kx80. Must have a fork for Hobbit diameter wheels or close.

Re: Let's be on the level

todd amundson /

This I can see being really weird on a Hobbit. Those forks I’ve mounted on a couple bikes and fucked with the geometry and rake. Way long. I shortened the ones on the Diablo after I nicked the tubes right where the seal lands. Which means never try to replace a fork seal without complete disassemble. Oh yeah and I had to make a custom wrench in the end.

DE2F8B88-FCA0-46A1-8086-311B368F1A3C.jpeg

Re: Let's be on the level

> Marc Friedman Wrote:

> -------------------------------------------------------

> >

> The geometry of these kx80 dual crown forks makes for a wheelie daily

> which I could do without. Unfortunately my calculations are 15" from

> bottom of crownsteerer to front axle. This motorcycle fork bottoms are

> 14" tall.. interestingly the dual.crown fork on my old downhill mountain

> bike are both 35 mm diameter with 28" length.

>

> Is there a 35 mm stanchions fork diameter but with shorter legs that

> anyone is aware of...I'm trying not to mess with the actual triple tree

> because I needed the hobbit heat tube shortened for this particular one.

> But I guess I'd contemplate a complete new front fork...the reason the

> fork is apart is because the lower damper tubes aren't correctly sealing

> so the fork has no damping qualities. So might be easier to start over.

> My goal is a level bike. I'm in the process of lowering the rear shocks

> with a new intake from mlm if he ever makes any more 21 mm Dio ones.

>

> Some kind of mini Moto bike fork set up I imagine.

Most 35mm forks are going to be too long. Ask an eBay seller the length of a pair of Kawasaki ex250 forks. Probably workable after shortening.

Here's a list of compatible 35mm Japanese forks.

Older Ducatis and Harley's also used 35mm forks

Re: Let's be on the level

It is pretty damn easy to shorten the front end, just do it. My roommate put some motocross front end on his hobbit and literally shortened them a foot

Re: Let's be on the level

Nick ... They were already shortened by myself I think I shortened them about 8 in and my point is is that if you don't want to tip the front end up and you have the bottom of the shock is cast magnesium aluminum you'd have to have a shorter one of those instead of 14 in long need something like 11 in ... But I think that if I can get the oil damper seal which I I don't even know where to begin to find this thing it's just I need something that keeps that rod tight on the inside of the 35 mm stanchion that it goes up and it travels back up and down and and all I need is 2 inches of really stout suspension and I think the KX 80 forks will be fine If I can figure out something to act as a seal of that damper to the inside of the stanchion I swear I'm sort of stuck and once I do that I'll cut the spring down but I have a feeling that I'm going to need a stronger spring than a very tiny section of a KX8 0 spring I think I need something that's way way more unforgiving so it gets a little complicated and but I do appreciate everyone's input If anyone thinks of a solution I'd like I mean I know other people have done this and been very happy with it so I don't know whatever happened to these seals and I don't know whatever what these forks were I bought them off moped army They were rusted to hell and waste of time so at the very least if I need to find I think two new fork legs and then if I can get a hold of two fork legs and then cut the springs on those and either use them on the other side as a return springs but something that's actually got the oil dampers got a seal around it I think I'll be fine

Re: Let's be on the level

so I'm in the back country mountain biking but taking a break so when I get home I'm going to take off the other forklake one of the forklakes I gave to my diesel buddy Bobby who's going to show it to some motor bike shop guy who try to figure out the seal thing But let me take it apart and show people just what I'm missing here maybe someone will say oh well fool just get this screws on okay so I'll take that other forkleg apart.

Re: Let's be on the level

Not sure any of this will help your search :

Make/Model year Range Fork Length mm (inch)

axle center to fork cap top extended suspension

Buell

M1 700mm (27,5'')

M2 730mm (28,75'')

Ducati

998s ohlins 720mm (28,374'')

monster 750ie 02 730mm (28,74'')

st3 04-05 725mm (28,54'')

st4s 02-03 697mm (27,44'')

Harley Davidson

most 812mm (32'')

Honda

CBR1000RR 692mm (27,25'')

CBR600F1 87-90 738mm (29,05'')

CBR929 00-01 724mm (28,5'')

CBR954 02-05 724mm (28,5'')

RC51 SP1 762MM (30'')

RC51 SP2 736MM (28,97'')

vfr 750 fl 791mm (31,15'')

VFR800 780mm (30,75'')

vtr1000f 778mm (30,62'')

kawasaki

fz1 2007 762mm (30'')

versys 774mm (30'')

ZRX1100 766mm (30,15'')

ZX10R 06-07 743mm (29,25'')

ZX10R 04-05 730mm (28,75'')

ZX14 742mm (29,25'')

ZX636 750mm (29,5'')

ZX9r B4 94-97 766mm (30,15'')

Suzuki

GSF 400 JDM 820mm (32'')

GSXR1000 01-02 726mm (28,54'')

GSXR1000 03-04 720mm (28,34'')

GSXR1000 05-06 720mm (28,34'')

GSXR1000 07-08 720mm (28,34'')

GSXR1100W 94 770mm mm (30,25)

Gsxr1300 Hayabusa 99-07 725mm (28,54'')

Gsxr1300 Hayabusa 08

GSXR600 00-03

GSXR600 04-05 720mm (28,34'')

GSXR600 06-07 738mm (29,05'')

GSXR750 90-95 750mm (29,5'') 257mm (10 1/8'')

GSXR750 00-03

GSXR750 04-05 720mm (28,34'')

GSXR750 06-07 738mm (29,05'')

GSXR750 SRAD 96-99 730mm (28,75'')

RF600 97 750mm (29,5'') 257mm (10 1/8'')

TL1000R all 717mm (28,22'')

TL1000S all 732mm (28,81'')

VZ800 Marauder 838mm (33'')

Yamaha

FZR400 790mm(31.1'')

FZ750 1986 825mm (32,5'')

FZR1000 87-88 770mm (30,3'')

FZR1000 exup 89 770mm (30,25'')

XV920 J virago 82-83 825mm (32,5'')

AND :

Some bikes that use 35 mm fork tubes :

35 Honda CR-80R (87-95)

35 Honda CR-125M "Elsinore" (76)

35 Honda CR-125M "Elsinore" (77-78)

35 Honda NX-125 (88-90)

35 Honda XR-200R (81-83)

35 Honda CL72 "Scrambler 250"

35 Honda CR-250M/M1 "Elsinore" (73, 75-76)

35 Honda MR-250 "Elsinore" (76)

35 Honda VTR-250 "Interceptor VTR" (88-90)

35 Honda XL-250 "Motosport 250" (72, 74-76)

35 Honda XL-250S (78-80 To 5204066)

35 Honda XL-250S (80 From 5204067 - 81)

35 Honda XR-250 (79-80)

35 Honda CL77 "Scrambler 305"

35 Honda SL-350 "Motosport 350" (72)

35 Honda XL-350 (74-78)

35 Honda CL-450 "Scrambler" (69-72)

35 Honda CB-450 (70-74)

35 Honda CB-500 "500 Four" (71-73)

35 Honda CX-500C "Custom" (81-82)

35 Honda GB-500 (89-90)

35 Honda GL-500/I (81-82)

35 Honda XL-500S (79-80 To 5104835)

35 Honda XL-500S (80- 81)

35 Honda CB-550 "550 Four K" (74-78)

35 Honda CB-650 (79-80)

35 Honda CB-650 (81-82)

35 Honda CB-650C (80 To 2009951)

35 Honda CB-750K (69)

35 Honda CB-750 "750 Four" (70, 72)

35 Honda CB-750A "750 Hondamatic" (76-78)

35 Honda CB-750C "Custom" (80-82)

35 Honda CB-750F "Super Sport" (75-78)

35 Honda CB-750F (79-80)

35 Honda CBX (79-80)

35 Kawasaki KX-80 G1/G2 (86-87)

35 Kawasaki KX-80 L1-L3/N1-N3 (88-90)

35 Kawasaki KE-175D1-D4 (80-83)

35 Kawasaki EX-250E1/E2 "Ninja" (86-87)

35 Kawasaki KE-250B1-B3 (77-79)

35 Kawasaki KZ-550H1/H2 "GP" (82-83)

35 Kawasaki ZX-550A1-A3 "GPz" (84-86)

35 Suzuki RM-80 K/L/M/N/P (89-93)

35 Suzuki RM-80 R/S/T/V/W/X/Y/K1 (94-01)

35 Suzuki RM-100 N/T/X (79-81)

35 Suzuki DR-125 G/H/J (86-88)

35 Suzuki DR-125 SER/SES/SET (94-96)

35 Suzuki RM-125 M/A (75-76)

35 Suzuki SP-125 G/H/J (86-88)

35 Suzuki DR-200 G/H/J (86-88)

35 Suzuki DR-200 SET/SEV/SEW/SEX/SEY/SEK1/SEK2/SK3 (96-03)

35 Suzuki RL-250 L/M "Exacta" (74-75)

35 Suzuki SP-250 Z/D/F (82-83, 85)

35 Suzuki TS-250 1 "Savage" (69)

35 Suzuki TS-250 B/C/N (77-79)

35 Suzuki GN-400 T/XT/XX/TX/TZ (80-82)

35 Suzuki TM-400 K/L/M "Cyclone" (73-75)

35 Suzuki GS-450 LD (83)

35 Suzuki GS-450 LF/LG/LH/LJ (85-88)

35 Suzuki GT-500 A/B "Titan" (76-77)

35 Suzuki RE-5M, A

35 Suzuki GS-550 LX/ LZ (81-82)

35 Suzuki GS-550 B/C/EC (77-78)

35 Suzuki GS-550 LN/LT (79-80)

35 Suzuki GS-550 LG (86)

35 Suzuki GT-550 J/K "Indy" (72-73)

35 Suzuki GT-550 K (KAYABA)/ L (73-74)

35 Suzuki GR-650 D/XD "Tempter" (83)

35 Suzuki GS-650 EX/EZ(81-82)

35 Suzuki GS-650 GLX/GLZ/GLD(81-83)

35 Suzuki GS-750 B/C/EC (77-78)

35 Suzuki GS-750 EX/EZ (81-82)

35 Suzuki GS-750 LT/LX (80-81)

35 Suzuki GS-750 TZ/TD (82-83)

35 Suzuki GT-750 J/K/L/M/A/B "Lemans" (72-77)

35 Yamaha YZ-100 G/H (80-81)

35 Yamaha IT-125 H (81)

35 Yamaha RT-180A/B/C (90-93)

35 Yamaha XT-200 J/K/KC (82-83)

35 Yamaha XT-250 G/H/J/K/KC (80-83)

35 Yamaha TZ-250 C/D/E (76-78)

35 Yamaha TZ-250 F (79)

35 Yamaha RZ-350 L/N/NC/NCII (84-85)

35 Yamaha TZ-350 /C/D/E (72-78)

35 Yamaha XS-400 J/K "Maxim" (82-83)

35 Yamaha SR-500 E/F/G/H (78-81)

35 Yamaha XS-500 C/D/E (76-78)

35 Yamaha XJ-550 RH/RJ/RK "Seca" (81-83)

35 Yamaha XZ-550 RJ/RK "Vision" (82-83)

35 Yamaha XS-650 D/E/F/2F (77-79)

35 Yamaha XS-650 SE/SF/SG/SH/SJ (78-82)

35 Yamaha TX-750/A (73-74)

35 Yamaha XS-750 D (77)

Hope that helps . ;)

Re: Let's be on the level

Wow PD !!

Re: Let's be on the level

Just cut your springs more you dope

It works great. (edited)

Re: Let's be on the level

This is what's wrong with the build of the fork, I think. It would be easy to further cut the springs except for this issue.

Re: Let's be on the level

15987553053438698131632405297320.jpg
15987552710734312875050447868875.jpg

So after much consternation, regurgitation, speculation I cut the springs. Now the total length of the spring is 13" which basically gets me 19" from front axle to top of the frames head tube ...stick is 18.5". As soon as mlm 21 mm curvy intake is back in stock I am going to get the rear back to OEM height ..yeah I took off the mutants green motocross front fender and mcivered the front fender but it's sketch. Bike feels great.

How does the fork feel ...survive able. The pogo sticking is way reduced. It's impossible with the design of the damper to restrict the length of the fork except by the weight of the bike. I've if for some reason ya wheelie the fork legs can extend without support...the way to do that is to shorten the fork legs...another project for another time.

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account