Helweg Posted March 5, 2017 Share Posted March 5, 2017 After a long winter - almost ready to fly again - I've wondered why my sidestand is to short app. 20 mm, bike is like laying down.just renovated front suspension with new seals ect. - Found the rear spring is a hyperpro purple spring and std. shock. With a std shock the hight is none adjustable on a RC36-1. All the links below is original -when the bike is on its center stand, the rear wheel is just 20mm above the ground, does anyone know if there is a trick to raise the length of a shock on RC36-1 ? I don't know who mounted the hyperpro on the rear, but it looks like the shock is a few mm to long - any good ideas cheers Link to comment Share on other sites More sharing options...
Member Contributer Terry Posted March 5, 2017 Member Contributer Share Posted March 5, 2017 On the later RC36 (93-97), there is a top clevis mount that bolts vertically through the frame that can be shimmed to change the ride height (same as my VTR1000 and 5G VFR800), but I don't think that applies to your 1990, the top shock mount looks to bolt horizontally through the main frame in a fixed location. So I would doubt that you can have a modified rear ride height with a standard shock and linkages. Are you sure that the shock is not also changed for some other Honda part? Link to comment Share on other sites More sharing options...
rhubarb Posted March 6, 2017 Share Posted March 6, 2017 Changing to a harder spring should not affect the length of the stock shock with the bike unloaded. The shock will top out at the OEM length unless it's been internally modified. The rear tire sitting 20mm shy of the ground on the centerstand, within the variances of tire height, seems close to stock. I'll check my 91 later tonight. It sounds like the sidestand may have been shortened or check if the front end spring spacers are too short. long. (Derp) My 91 rear tire is around 1.5 inches ( ≈ 38mm) above the ground on the c/stand. It's a Metzeler Z6 170/60-17 with a 636mm diameter. I doubt you have a tire that's 40mm taller so it's likely the shock or linkage has been modified. Just for comparison, the sidestand is ten inches from the middle of the pivot bolt to the round tip. Link to comment Share on other sites More sharing options...
Helweg Posted March 6, 2017 Author Share Posted March 6, 2017 I had time to do some more investigations today side stand is 10 inch long tried to lower the front 15 mm to se how muck that'll give. - side stand is still 1,5 - 2 cm to short rear shock is std but with a hyperpro spring took it down from the lift again - with wife holding the bike I measured the fork leg from top to buttom 82,2 cm - the same as with the front lifted - I guess it's called "SAG" or something, When I sit on the bike i lowers 2,5cm in front I think the previus owner has been a heavy guy - putting in some heawy springs took a measure at my NR 750 replica, build over the same bike, fork length "SAG" is 78,2cm = 4 cm shorter I have a feeling that the solution is new springs fitting my weight can't se any stamps on the springs just the purple at the rear and a printed logo on it - frontsprings is no name or signs is there a way to determin the strength of the springs Link to comment Share on other sites More sharing options...
Member Contributer JZH Posted March 6, 2017 Member Contributer Share Posted March 6, 2017 I think there may only be one Hyperpro progressive spring (one size fits all!), but I'm not certain. Did someone "flip the eccentric", by any chance? That would result in an instant 30-40mm extra rear ride height. If the rear caliper bracket carrier bolts have been countersunk, that will be it. Ciao, Link to comment Share on other sites More sharing options...
rhubarb Posted March 7, 2017 Share Posted March 7, 2017 8 hours ago, Helweg said: is there a way to determin the strength of the springs Check to see if the rate is engraved on the end surface. Link to comment Share on other sites More sharing options...
Helweg Posted March 9, 2017 Author Share Posted March 9, 2017 good news I contacted hyperpro with my issue A guy from Hyperpro Holland "John Troost" took time to guide me - together we found out that springs in front is Hyperpro, but they were mounted upside down " not that this matters in my case " but the worst was, who ever installed them back before 2007 did use the original spacers 50mm According to John, with my weight ect..ect., a 15mm spacer should do the trick - the rear is mounted correct did the mod yesterday, what a difference sag is just correct now. And the side stand is long enough now. can't wait to come home and test ride it today. I only had two or three turns on it last year, and it felt bad, anyway thanks for your input. cheers ! Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.