|
|||||||
| Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions. |
ALL HU Travellers Meetings now open for registration. We hope to see YOU at one of them this year!
Germany Meeting May 17-20,
HUBB UK May 30-June 2,
Montenegro Meeting June 27-30,
Ireland Meeting July 12-14,
Colorado Campfire July 12-14,
North Carolina Meeting Aug 8-11,
CanWest Meeting Aug 22-25,
Kyrgyzstan Mini-Meeting Aug 31, Ontario Canada Meeting Sept 12-15,
Queensland Australia Meeting Sep 26-29,
Victoria Australia Meeting Oct 11-13,
California Meeting Oct 24-27
 |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
15 Sep 2006
|
|||
|
|||
|
performance upgrades?
I am looking at a 89 xt600 with 14K miles. Will this motor handle a big bore kit
which takes it to 633cc and has a 10 to 1 piston. I would also like to install a mild performance cam. Have you don this? What doe you think? Would these modifications add 10 HP? Thanks, Jay. 
|
|
#2
15 Sep 2006
|
|||
|
|||
|
errrr
are you planning on long distance touring????
If you use the low octane foreign fuel, you will trash the high compression piston. If you are only using the bike for blatting around GB, undoubtably it will handle the extra HP (but don't believve the claims of the people selling the bits - they are biased). Try ringing a decent dyno house. They will have years of experience. You will find most people on this forum are interested in long term reliablity, not Horse power. - having said that I use a c90 with a lumpy cam and big carb!! 
__________________
Harley Davidsons, The most effective way of turning petrol into noise without the side-effect of horsepower
|
|
#3
15 Sep 2006
|
|||
|
|||
|
Spend the money on petrol/
 and enjoy yourself.
|
|
#4
17 Sep 2006
|
|||
|
|||
|
Enjoy a reliable bike, you'll pay a lot each hp and they won't be that impressive.
XT is a torque mono, play with that and enjoy. Power is the ability of the engine to remain on high rpm's as a supersport going upwards a hill without losing any rounds once in spin. Torque is the raw strength of the engine, ever tried to screw a 22 nut with your fingers..take a long grip, that multiplicates the strength from your hands, torque is the same thing and is due to many things; size of the piston, weight of the crankshaft, weight of the rotor, gearbox demultiplication, clutch demultiplication etc. Power and torque is a balance difficult to obtain by the yamaha enginers. An XT is made very good orginally, the balance shaft compensates vibrations and has exactly the same weight as the original piston..torque is well distributed from 0- 5500rpm. Changing the piston might give you naughty vibrations, only that makes the engine much less reliable. You will change the engine character and in the end probably the bike will be less performant than original, high compression will create more heat to your aircooled cylinder, the vibes will torture your allready worn conrod and bearing + heat and torque on that= hello engine brake. I won't say for sure, but I wouldn't do those changes, everyone is free of course. Cheers, Matt
|
|
#5
17 Sep 2006
|
|||
|
|||
|
performance upgrade
mines got high comp piston 11to1 621cc,yoshimura cam,keihin race carbs,
gas flowed head,comp exhaust,its a hooligan runs very smooth very fast eats ccm ktms put a wheelie wand on it to try keep front wheel on thr ground i like it
|
|
#6
17 Sep 2006
|
|||
|
|||
|
ummm
I bet in an overlanding trip my c90 would be faster...
as in it would get there with luggage running on crap fuel!
__________________
Harley Davidsons, The most effective way of turning petrol into noise without the side-effect of horsepower
|
|
«
Previous Thread
|
Next Thread
»
| Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
Linear Mode
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| poor performance from TLC H60 | moggy 1968 | 4WD Overland Tech | 4 | 19 Sep 2006 07:47 |
| TTR 600 Performance | bolla | Yamaha Tech | 3 | 3 Jun 2005 02:52 |
| ST1100 suspension upgrades | stguy | Honda Tech | 0 | 24 Feb 2004 00:13 |
| XT600 Performance | Juey | Yamaha Tech | 1 | 28 Jul 2003 22:25 |
| performance filters | DAVSATO | Yamaha Tech | 2 | 16 Apr 2002 04:57 |
All times are GMT +1. The time now is 22:54.
